16.47
                                                                          0.274
                                                                            251
 MD 30mph Freeway
                                                                           34.4
                                                                          62.60
                                                                              0
                                                                           0.0%
                                                                         15.633
                                                                        1637.00
                                                                          27.28
                                                                          0.455
                                                                            252
 MD 40mph Freeway
                                                                           44.5
                                                                          70.40
                                                                              0
                                                                           0.0%
                                                                         43.329
                                                                        3504.00
                                                                          58.40
                                                                          0.973
                                                                            253
 MD 50mph Freeway
                                                                           55.4
                                                                          72.20
                                                                              0
                                                                           0.0%
                                                                         41.848
                                                                        2718.00
                                                                          45.30
                                                                          0.755
                                                                            254
 MD 60mph Freeway
                                                                           60.1
                                                                          68.40
                                                                              0
                                                                           0.0%
                                                                         81.299
                                                                        4866.00
                                                                          81.10
                                                                          1.352
                                                                            255
 MD High Speed Freeway
                                                                           72.8
                                                                          80.40
                                                                              0
                                                                           0.0%
                                                                         96.721
                                                                        4782.00
                                                                          79.70
                                                                          1.328
                                                                            301
 HD 5mph Non-Freeway
                                                                            5.8
                                                                          19.90
                                                                             37
                                                                          14.2%
                                                                          0.419
                                                                         260.00
                                                                           4.33
                                                                          0.072
                                                                            302
 HD 10mph Non-Freeway
                                                                           11.2
                                                                          29.20
                                                                             70
                                                                          11.5%
                                                                          1.892
                                                                         608.00
                                                                          10.13
                                                                          0.169
                                                                            303
 HD 15mph Non-Freeway
                                                                           15.6
                                                                          38.30
                                                                             73
                                                                          12.9%
                                                                          2.463
                                                                         567.00
                                                                           9.45
                                                                          0.158
                                                                            304
 HD 20mph Non-Freeway
                                                                           19.4
                                                                          44.20
                                                                             84
                                                                          15.1%
                                                                          3.012
                                                                         558.00
                                                                           9.30
                                                                          0.155
                                                                            305
 HD 25mph Non-Freeway
                                                                           25.6
                                                                          50.70
                                                                             57
                                                                           5.8%
                                                                          6.996
                                                                         983.00
                                                                          16.38
                                                                          0.273
                                                                            306
 HD 30mph Non-Freeway
                                                                           32.5
                                                                          58.00
                                                                             43
                                                                           5.3%
                                                                          7.296
                                                                         809.00
                                                                          13.48
                                                                          0.225
                                                                            351
 HD 30mph Freeway
                                                                           34.3
                                                                          62.70
                                                                              0
                                                                           0.0%
                                                                         21.659
                                                                        2276.00
                                                                          37.93
                                                                          0.632
                                                                            352
 HD 40mph Freeway
                                                                           47.1
                                                                          65.00
                                                                              0
                                                                           0.0%
                                                                         41.845
                                                                        3197.00
                                                                          53.28
                                                                          0.888
                                                                            353
 HD 50mph Freeway
                                                                           54.2
                                                                          68.00
                                                                              0
                                                                           0.0%
                                                                         80.268
                                                                        5333.00
                                                                          88.88
                                                                          1.481
                                                                            354
 HD 60mph Freeway
                                                                           59.7
                                                                          69.00
                                                                              0
                                                                           0.0%
                                                                         29.708
                                                                        1792.00
                                                                          29.87
                                                                          0.498
                                                                            355
 HD High Speed Freeway
                                                                           71.7
                                                                          81.00
                                                                              0
                                                                           0.0%
                                                                         35.681
                                                                        1792.00
                                                                          29.87
                                                                          0.498
                                                                            396
 HD High Speed Freeway Plus 5 mph
                                                                           76.7
                                                                          86.00
                                                                              0
                                                                           0.0%
                                                                         38.170
                                                                        1792.00
                                                                          29.87
                                                                          0.498
                                                                            397
 MD High Speed Freeway Plus 5 mph
                                                                           77.8
                                                                          85.40
                                                                              0
                                                                           0.0%
                                                                        103.363
                                                                        4782.00
                                                                          79.70
                                                                          1.328
                                                                            398
 CRC E55 HHDDT Creep
                                                                            1.8
                                                                           8.24
                                                                            107
                                                                          42.3%
                                                                          0.124
                                                                         253.00
                                                                           4.22
                                                                          0.070
                                                                            401
 Bus Low Speed Urban (nominal 15 mph)
                                                                            3.1
                                                                          19.80
                                                                            288
                                                                          63.9%
                                                                          0.393
                                                                         451.00
                                                                           7.52
                                                                          0.125
                                                                            402
 Bus 30 mph Flow (nominal 30 mph)
                                                                           11.5
                                                                          33.80
                                                                            109
                                                                          37.5%
                                                                          0.932
                                                                         291.00
                                                                           4.85
                                                                          0.081
                                                                            403
 Bus 45 mph Flow (nominal 45 mph)
                                                                           21.9
                                                                          47.00
                                                                            116
                                                                          28.3%
                                                                          2.492
                                                                         410.00
                                                                           6.83
                                                                          0.114
                                                                            404
 New York City Bus
                                                                            3.7
                                                                          30.80
                                                                            403
                                                                          67.2%
                                                                          0.615
                                                                         600.00
                                                                          10.00
                                                                          0.167
                                                                            405
 WMATA Transit Bus
                                                                            8.3
                                                                          47.50
                                                                            706
                                                                          38.4%
                                                                          4.261
                                                                        1840.00
                                                                          30.67
                                                                          0.511
                                                                            501
 Refuse Truck Urban
                                                                            2.2
                                                                          20.00
                                                                            416
                                                                          66.9%
                                                                          0.374
                                                                         622.00
                                                                          10.37
                                                                          0.173
                                                                           1009
 Final FC01LOSAF Cycle (C10R04-00854)
                                                                           73.8
                                                                          84.43
                                                                              0
                                                                           0.0%
                                                                         11.664
                                                                         569.00
                                                                           9.48
                                                                          0.158
                                                                           1011
 Final FC02LOSDF Cycle (C10R05-00513)
                                                                           49.1
                                                                          73.06
                                                                             34
                                                                           5.0%
                                                                          9.283
                                                                         681.00
                                                                          11.35
                                                                          0.189
                                                                           1017
 Final FC11LOSB Cycle (C10R02-00546)
                                                                           66.4
                                                                          81.84
                                                                              0
                                                                           0.0%
                                                                          9.567
                                                                         519.00
                                                                           8.65
                                                                          0.144
                                                                           1018
 Final FC11LOSC Cycle (C15R09-00849)
                                                                           64.4
                                                                          78.19
                                                                              0
                                                                           0.0%
                                                                         16.189
                                                                         905.00
                                                                          15.08
                                                                          0.251
                                                                           1019
 Final FC11LOSD Cycle (C15R10-00068)
                                                                           58.8
                                                                          76.78
                                                                              0
                                                                           0.0%
                                                                         11.922
                                                                         730.00
                                                                          12.17
                                                                          0.203
                                                                           1020
 Final FC11LOSE Cycle (C15R11-00851)
                                                                           46.1
                                                                          71.50
                                                                              1
                                                                           0.1%
                                                                         12.468
                                                                         973.00
                                                                          16.22
                                                                          0.270
                                                                           1021
 Final FC11LOSF Cycle (C15R01-00876)
                                                                           20.6
                                                                          55.48
                                                                             23
                                                                           2.5%
                                                                          5.179
                                                                         905.00
                                                                          15.08
                                                                          0.251
                                                                           1024
 Final FC12LOSC Cycle (C15R04-00582)
                                                                           63.7
                                                                          79.39
                                                                              0
                                                                           0.0%
                                                                         15.685
                                                                         887.00
                                                                          14.78
                                                                          0.246
                                                                           1025
 Final FC12LOSD Cycle (C15R09-00037)
                                                                           52.8
                                                                          73.15
                                                                             12
                                                                           1.5%
                                                                         11.754
                                                                         801.00
                                                                          13.35
                                                                          0.223
                                                                           1026
 Final FC12LOSE Cycle (C15R10-00782)
                                                                           43.3
                                                                          70.87
                                                                              0
                                                                           0.0%
                                                                         10.973
                                                                         913.00
                                                                          15.22
                                                                          0.254
                                                                           1029
 Final FC14LOSB Cycle (C15R07-00177)
                                                                           31.0
                                                                          63.81
                                                                             27
                                                                           3.6%
                                                                          6.498
                                                                         754.00
                                                                          12.57
                                                                          0.209
                                                                           1030
 Final FC14LOSC Cycle (C10R04-00104)
                                                                           25.4
                                                                          53.09
                                                                             41
                                                                           8.0%
                                                                          3.617
                                                                         513.00
                                                                           8.55
                                                                          0.143
                                                                           1033
 Final FC14LOSF Cycle (C15R05-00424)
                                                                            8.7
                                                                          44.16
                                                                            326
                                                                          38.2%
                                                                          2.066
                                                                         853.00
                                                                          14.22
                                                                          0.237
                                                                           1041
 Final FC17LOSD Cycle (C15R05-00480)
                                                                           18.6
                                                                          50.33
                                                                            114
                                                                          16.1%
                                                                          3.659
                                                                         709.00
                                                                          11.82
                                                                          0.197
                                                                           1043
 Final FC19LOSAC Cycle (C15R08-00267)
                                                                           15.7
                                                                          37.95
                                                                             67
                                                                           7.7%
                                                                          3.802
                                                                         870.00
                                                                          14.50
                                                                          0.242

Appendix E: MOVES2010b Source Masses
Light-duty source masses were unchanged from MOVES2010b. In addition, the heavy-duty source masses originally come from MOVES2010b, although they have been updated as described in Section 14.1.

In MOVES2010b, weight data (among other kinds of information) were used to allocate source types to source bins using a field called weightClassID. Each source type's source mass was calculated using an activity-weighted average of their associated source bins' midpoint weights:

                           M= afa∙bαb∙mbαbafa
                                                                    Equation 40
where M is the source mass factor for the source type, fa is the age fraction at age a, αb is the source bin activity fraction for source bin b, and m is the vehicle midpoint mass. Table 19-1 lists the vehicle midpoint mass for each weightClassID. The source bin activity fraction in MOVES2010b is a calculated value of activity based on fuel type, engine technology, regulatory class, model year, engine size, and weight class. This calculation is outside the scope of this document, but more information can be found in the MOVES2010b SDRM.

                        Table 21-1 MOVES Weight Classes
                                 WeightClassID
                               Weight Class Name
                                Midpoint Weight
                                                                              0
                                Doesn't Matter
     [NULL]
                                                                             20
                            weight < 2000 pounds
                                                                           1000
                                                                             25
                   2000 pounds <= weight < 2500 pounds
                                                                           2250
                                                                             30
                   2500 pounds <= weight < 3000 pounds
                                                                           2750
                                                                             35
                   3000 pounds <= weight < 3500 pounds
                                                                           3250
                                                                             40
                   3500 pounds <= weight < 4000 pounds
                                                                           3750
                                                                             45
                   4000 pounds <= weight < 4500 pounds
                                                                           4250
                                                                             50
                   4500 pounds <= weight < 5000 pounds
                                                                           4750
                                                                             60
                   5000 pounds <= weight < 6000 pounds
                                                                           5500
                                                                             70
                   6000 pounds <= weight < 7000 pounds
                                                                           6500
                                                                             80
                   7000 pounds <= weight < 8000 pounds
                                                                           7500
                                                                             90
                   8000 pounds <= weight < 9000 pounds
                                                                           8500
                                                                            100
                  9000 pounds <= weight < 10000 pounds
                                                                           9500
                                                                            140
                  10000 pounds <= weight < 14000 pounds
                                                                          12000
                                                                            160
                  14000 pounds <= weight < 16000 pounds
                                                                          15000
                                                                            195
                  16000 pounds <= weight < 19500 pounds
                                                                          17750
                                                                            260
                  19500 pounds <= weight < 26000 pounds
                                                                          22750
                                                                            330
                  26000 pounds <= weight < 33000 pounds
                                                                          29500
                                                                            400
                  33000 pounds <= weight < 40000 pounds
                                                                          36500
                                                                            500
                  40000 pounds <= weight < 50000 pounds
                                                                          45000
                                                                            600
                  50000 pounds <= weight < 60000 pounds
                                                                          55000
                                                                            800
                  60000 pounds <= weight < 80000 pounds
                                                                          70000
                                                                           1000
                 80000 pounds <= weight < 100000 pounds
                                                                          90000
                                                                           1300
                 100000 pounds <= weight < 130000 pounds
                                                                         115000
                                                                           9999
                          130000 pounds <= weight
                                                                         130000
                                                                              5
                       weight < 500 pounds (for MCs)
                                                                            350
                                                                              7
               500 pounds <= weight < 700 pounds (for MCs)
                                                                            600
                                                                              9
                       700 pounds <= weight (for MCs)
                                                                            700

The following sections detail how weight classes were assigned to the various source types in MOVES.
Motorcycles
The Motorcycle Industry Council "Statistical Annual" provides information on displacement distributions for highway motorcycles for model years 1990 and 1998. These were mapped to MOVES engine displacement categories.  Additional EPA certification data was used to establish displacement distributions for model year 2000.  We assumed that displacement distributions were the same in 1969 as in 1990, and interpolated between the established values to determine displacement distributions for all model years from 1990 to 1997 and for 1999. Values for 2000-and-later model years are based on model year 2000 certification data.

We then applied weight distributions for each displacement category as suggested by EPA motorcycle experts. The average weight estimate includes fuel and rider. The weight distributions depended on engine displacement but were otherwise independent of model year. This information is summarized in Table 19-2.

Table 21-2 Motorcycle Engine Size and Average Weight Distributions for Selected Model Years
                             Displacement Category
                        1969 MY distribution (assumed)
                          1990 MY distribution (MIC)
                          1998 MY distribution (MIC)
                                    2000 MY
                                 distribution
                             (certification data)
                        Weight distribution (EPA staff)
0-169 cc (1)
                                                                          0.118
                                                                          0.118
                                                                          0.042
                                                                          0.029
100%:  <= 500 lbs
170-279 cc (2)
                                                                           0.09
                                                                           0.09
                                                                           0.05
                                                                          0.043
50%:   <= 500 lbs
50%:  500lbs -700lbs
280+ cc (9)
                                                                          0.792
                                                                          0.792
                                                                          0.908
                                                                          0.928
30%:  500 lbs-700 lbs
70%:   > 700lbs

Passenger Cars
Passenger car weights come from Polk. The weightClassID was assigned by adding 300 lbs to the Polk curb weight and grouping into MOVES weight bins.  For each fuel type, model year, engine size, and weight bin, the number of cars was summed and fractions were computed. In general, entries for which data was missing were omitted from the calculations. Also, analysis indicated a likely error in the Polk data (an entry for 1997 gasoline-powered Bentleys with engine size 5099 and weight class 20). This fraction was removed and the 1997 values were renormalized. 1999 model year values were used for all 2000-and-later model years.

General Trucks
Light-Duty Trucks
Determining weight categories for light trucks was fairly complicated.  The VIUS 1997 data combines information from two different survey forms.  The first form was administered for VIUS "Strata" 1 and 2 trucks: pickup trucks, panel trucks, vans (including mini-vans), utility type vehicles (including jeeps) and station wagons on truck chassis. The second form was administered for all other trucks.  While both surveys requested information on engine size, only the second form requested detailed information on vehicle weight.  Thus for Strata 1 and 2 trucks, VIUS classifies the trucks only by broad average weight category (AVGCK): 6,000 lbs or less, 6,001-10,000 lbs, 10,001-14,000lbs, etc. To determine a more detailed average engine size and weight distribution for these vehicles, we used an Oak Ridge National Laboratory (ORNL) light-duty vehicle database, compiled from EPA test vehicle data and Ward's Automotive Inc. data, to correlate engine size with vehicle weight distributions by model year.

In particular, for source types 31 and 32 (Passenger Trucks and Light Commercial Trucks):
   VIUS 1997 trucks of the source type in Strata 3, 4, and 5 were assigned to the appropriate MOVES weight class based on VIUS detailed average weight information.
   VIUS 1997 trucks of the source type in Strata 1 and 2 were identified by engine size and broad average weight category.
   Strata 1 and 2 trucks in the heavier (10,001-14,000 lbs, etc) VIUS 1997 broad categories were matched one-to-one with the MOVES weight classes.
   For trucks in the lower broad categories (6,000 lbs or less and 6001-10,000 lbs), we used VIUS 1997 to determine the fraction of trucks by model year and fuel type that fell into each engine size/broad weight class combination (the "VIUS fraction")
   We assigned trucks in the ORNL light-duty vehicle database to a weightClassID by adding 300lbs to the recorded curb weight and determining the appropriate MOVES weight class.
   For the trucks with a VIUS 1997 average weight of 6,000 lbs or less, we multiplied the VIUS 1997 fraction by the fraction of trucks with a given weightClassID among the trucks in the ORNL database that had the given engine size and an average weight of 6,000 lbs or less.  Note, the ORNL database did not provide information on fuel type, so the same distributions were used for all fuels.
   Because the ORNL database included only vehicles with a GVW up to 8500 lbs, we did not use it to distribute the trucks with a VIUS 1997 average weight of 6,001-10,000 lbs. Instead these were distributed equally among the MOVES weightClassID 70, 80, 90 and 100.

Single Unit Trucks
Source types 52 and 53 (Long- and Short-haul Single Unit Trucks) also included some trucks in VIUS 1997 Strata 1 and 2, thus a similar algorithm was applied.

   VIUS 1997 trucks of the source type in Strata 3, 4, and 5 were assigned to the appropriate MOVES weight class based on VIUS 1997 detailed average weight information.
   VIUS 1997 trucks of the source type in Strata 1 and 2 were identified by engine size and broad average weight category.
   Strata 1 and 2 trucks in the heavier (10,001-14,000 lbs, etc) VIUS 1997 broad categories were matched one-to-one with the MOVES weight classes.
   For trucks in the lower broad categories (6,000 lbs-or-less and 6001-10,000 lbs), we used VIUS 1997 to determine the fraction of trucks by model year and fuel type that fell into each engine size/broad weight class combination (the "VIUS fraction")
   We did not believe the ORNL light-duty vehicle database adequately represented single unit trucks. Thus, the trucks with a VIUS 1997 average weight of 6,000 lbs or less and an engine size less than 5 liters were distributed equally among the MOVES weight classes 20, 25, 30, 35, 40, 45, 50, and 60. Because no evidence existed of very light trucks among the vehicles with larger engines (5 liter or larger), these were equally distributed among MOVES weight classes 40, 45, 50 and 60.
   The trucks with a VIUS 1997 average weight of 6,001-10,000 lbs were distributed equally among the MOVES weight classes 70, 80, 90 and 100.

Combination Trucks
Long- and short-haul combination trucks (source types 61 and 62) did not include any vehicles of VIUS 1997 Strata 1 or 2. Thus we used the detailed VIUS 1997 average weight information and engine size information to assign engine size and weight classes for all of these trucks.

When VIUS2002 became available, we updated values that had been based on VIUS1997. The VIUS 2002 contains an estimate of the average weight (vehicle weight plus cargo weight) of 1998-2002 model year vehicle or vehicle/trailer combination as it was most often operated when carrying a typical payload during 2002. These estimates were used to determine the MOVES weightClassID categories for these trucks. Table 4-5 shows the weight ranges used for each weightClassID. Any vehicles with a zero or missing value for the average weight and without a weight classification in the WeightAvgCK field were excluded from the analysis for determining the average weight distributions.

Since there is a smaller number of gasoline trucks among the single unit and refuse trucks, all model years (1998-2002) were combined to determine a single weight distribution to use for these model years.

The VIUS1997 based estimates were retained for light-duty trucks (source types 31 and 32) and for all model years prior to 1998.

In cases where distributions were missing (no survey information), distributions from a nearby model year with the same source type was used. Weight distributions for all 2003 and newer model years were set to be the same as for the 2002 model year for each source type.
Buses
For intercity buses, we used information from Table II-7 of the FTA 2003 Report to Congress[40] that specified the number of buses in various weight categories. This information is summarized in below in Table 19-3.  Note the FTA uses the term "over-the-road bus" to refer to the class of buses roughly equivalent to the MOVES intercity bus category.  The FTA weight categories were mapped to the equivalent MOVES weight classes.

                    Table 21-3 FTA Estimate of Bus Weights

                                 Weight (lbs)

                                 MOVES Weight
                                    ClassID
                           MOVES Weight Range (lbs)
                            Number of buses (2000)
                                   Bus type
                                   0-20,000

                                    173,536
                             school & transit
                                 20,000-30,000

                                    392,345
                             school & transit
                                 30,000-40,000
                                      400
                                 33,000-40,000
                                    120,721
                     school & transit & intercity
                                 40,000-50,000
                                      500
                                 40,000-50,000
                                    67,905
                                   intercity
                                     total

                                    754,509

                  Table 21-4 1999 Bus Population Comparisons
Data Source
Total Buses
Intercity Buses
Transit Buses
School Buses
FHWA MV-1

732,189

FHWA MV-10
(excludes PR)
728,777

592,029*
FHWA adjusted for PR

594,800
FTA NTD

55,706

APTA ***

75,087

Polk TIP(R)

460,178
School Bus Fleet Fact Book

429,086
Motorcoach Census[39]**

44,200

* Includes some church & industrial buses.
** Includes Canada.
*** Includes trolleybuses.

Using the 1999 bus population estimates in Table 19-4, we were able to estimate the fraction of all buses that were intercity buses and then to estimate the fraction of intercity buses in each weight bin.  In particular:

    Estimated number of intercity buses in 2000:

 	754,509 * (84,454/(84,454+55,706+592,029)) = 87,028

    Estimated number of intercity buses 30,000-40,000 lbs:

 	87,028 - 67,905 = 19,123
    Estimated intercity bus weight distribution:

 	Class 400 = 19,123/87,028 = 22%
       	Class 500 = 67,905/87,028 = 78%

This distribution was used for all model years.

For transit buses, we took average curb weights from Figure II-6 of the FTA Report to Congress[40] and added additional weight to account for passengers and alternative fuels.  The resulting in-use weights were all in the range from 33,850 to 40,850. Thus all transit buses were assigned to the weight class "400" (33,000 - 40,000 lbs) for all model years. This estimate could be improved if more detailed weight information for transit buses becomes available.

For school buses, we used information from a survey of California school buses. While this data is older and may not be representative of the national average distribution, it was the best data source available.  The California data provided information on number of vehicles by gross vehicle weight class and fuel as detailed in Table 19-5.

                      Table 21-5 California School Buses

                                      Gas
                                    Diesel
                                     Other
                                     Total
LHDV
                                                                           2740
                                                                           4567
                                                                              8
                                                                           7315
MHDV
                                                                            467
                                                                           2065
                                                                              2
                                                                           2534
HHDV
                                                                            892
                                                                          11639
                                                                            147
                                                                          12678
Total
                                                                           4099
                                                                          18271
                                                                            157

To estimate the distribution of average weights among the MOVES weight classes, we assumed that the Light Heavy-Duty (LHDV) school buses were evenly distributed among weightClassIDs 70, 80, 90, 100, and 140. Similarly, we assumed the Medium Heavy-Duty (MHDV) school buses were evenly distributed among weightClassIDs 140, 160, 195, 260, and 330 and the Heavy Heavy-Duty (HHDV) school buses were evenly distributed among weightClassIDs 195, 260, 330, and 440.

The final default weight distributions for buses are summarized in Table 19-6.

            Table 21-6 Weight Distributions for Buses by Fuel Type

                             Intercity Buses (41)
                              Transit Buses (42)
                               School Buses (43)
                                 Weight Class
                                    Diesel
                               Diesel & Gas
                                    Diesel
                                      Gas
                                      70

                                    0.0500
                                    0.1337
                                      80

                                    0.0500
                                    0.1337
                                      90

                                    0.0500
                                    0.1337
                                      100

                                    0.0500
                                    0.1337
                                      140

                                    0.0726
                                    0.1565
                                      160

                                    0.0226
                                    0.0228
                                      195

                                    0.1819
                                    0.0772
                                      260

                                    0.1819
                                    0.0772
                                      330

                                    0.1819
                                    0.0772
                                      400
                                    0.2197
                                    1.0000
                                    0.1593
                                    0.0544
                                      500
                                    0.7800

Refuse Trucks
Because the sample of Refuse Trucks in VIUS was small, the weight distributions were calculated for model year groups rather than individual model years.  As for other trucks, the WeightClass was determined from the VIUS reported average weight.
           Table 21-7 Refuse Truck SizeWeight Fractions by Fuel Type
Gasoline

Engine Size
Weight (lbs.)
Pre-1997
1997 and Newer

3-3.5L
5000-6000
                                                                       0.009074
                                                                              0

>5L
7000-8000
                                                                       0.148826
                                                                              0

>5L
9000-10000
                                                                       0.070720
                                                                              0

>5L
10000-14000
                                                                       0.135759
                                                                       0.324438

>5L
14000-16000
                                                                       0.199961
                                                                       0.593328

>5L
16000-19500
                                                                       0.055085
                                                                              0

>5L
19500-26000
                                                                       0.205341
                                                                              0

>5L
26000-33000
                                                                       0.022105
                                                                              0

>5L
33000-40000
                                                                       0.153129
                                                                              0

>5L
50000-60000
                                                                              0
                                                                       0.082234

Sum

                                                                       1.000000
                                                                       1.000000

Diesel

Engine Size
Weight (lbs.)
Pre-1998
                                                                           1998
                                                                           1999
                                                                           2000
                                                                           2001
2002 and Newer
3.5-4L
10000-14000
                                                                       0.007758
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
4-5L
10000-14000
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                       0.006614
4-5L
14000-16000
                                                                              0
                                                                              0
                                                                              0
                                                                       0.015505
                                                                              0
                                                                              0
4-5L
16000-19500
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                       0.011670
                                                                              0
>5L
9000-10000
                                                                       0.006867
                                                                       0.009593
                                                                              0
                                                                              0
                                                                              0
                                                                              0
>5L
10000-14000
                                                                       0.011727
                                                                              0
                                                                              0
                                                                              0
                                                                       0.019438
                                                                              0
>5L
14000-16000
                                                                       0.022960
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
>5L
16000-19500
                                                                       0.063128
                                                                              0
                                                                       0.011367
                                                                       0.047200
                                                                              0
                                                                              0
>5L
19500-26000
                                                                       0.099782
                                                                       0.035378
                                                                       0.026212
                                                                       0.052132
                                                                       0.018329
                                                                       0.026079
>5L
26000-33000
                                                                       0.102077
                                                                       0.019625
                                                                       0.067419
                                                                       0.072106
                                                                       0.043877
                                                                              0
>5L
33000-40000
                                                                       0.237485
                                                                       0.103922
                                                                       0.088975
                                                                       0.085991
                                                                       0.042678
                                                                       0.046966
>5L
40000-50000
                                                                              0
                                                                       0.283642
                                                                       0.275467
                                                                       0.165624
                                                                       0.266357
                                                                       0.194716
>5L
50000-60000
                                                                       0.336484
                                                                       0.338511
                                                                       0.326902
                                                                       0.384612
                                                                       0.315133
                                                                       0.474469
>5L
60000-80000
                                                                       0.111730
                                                                       0.196424
                                                                       0.193238
                                                                       0.176831
                                                                       0.282517
                                                                       0.224995
>5L
80000-100000
                                                                              0
                                                                              0
                                                                       0.010420
                                                                              0
                                                                              0
                                                                       0.013081
>5L
100000-130000
                                                                              0
                                                                       0.012904
                                                                              0
                                                                              0
                                                                              0
                                                                       0.013081
Sum

                                                                       1.000000
                                                                       1.000000
                                                                       1.000000
                                                                       1.000000
                                                                       1.000000
                                                                       1.000000

Motor Homes
No detailed information was available on average engine size and weight distributions for motor homes. We assumed all motor home engines were 5 L or larger. As a surrogate for average weight, we used information on gross vehicle weight provided in the Polk TIP(R) 1999 database by model year and mapped the Polk GVW Class to the MOVES weight bins.  These values are likely to overestimate average weight. The Polk TIP(R) information did not specify fuel type, so we assumed that the heaviest vehicles in the Polk database were diesel-powered and the remainder were powered by gasoline. This led to the weight distributions in Table 19-8 and Table 19-9.
       Table 21-8 Weight Fractions for Diesel Motor Homes by Model Year
                                 Polk GVW bin
                                       3
                                       4
                                       5
                                       6
                                       7
                                       8
                              MOVES weight class
                                      140
                                      160
                                      195
                                      260
                                      330
                                      400
                                  Model Year
                                    Diesel
                               1975-and-earlier
                                                                       0.171431
                                                                       0.792112
                                                                       0.029828
                                                                              0
                                                                       0.006629
                                                                              0
                                     1976
                                                                       0.637989
                                                                       0.340639
                                                                       0.018755
                                                                       0.000436
                                                                       0.002181
                                                                              0
                                     1977
                                                                        0.68944
                                                                       0.292308
                                                                       0.012168
                                                                       0.000277
                                                                       0.005531
                                                                       0.000277
                                     1978
                                                                       0.423524
                                                                       0.574539
                                                                              0
                                                                       0.000387
                                                                        0.00155
                                                                              0
                                     1979
                                                                       0.096922
                                                                       0.899344
                                                                              0
                                                                       0.001067
                                                                       0.002667
                                                                              0
                                     1980
                                                                       0.462916
                                                                       0.537084
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1981
                                                                              0
                                                                       0.941973
                                                                              0
                                                                       0.030174
                                                                              0
                                                                       0.027853
                                     1982
                                                                              0
                                                                       0.868333
                                                                              0
                                                                          0.049
                                                                           0.03
                                                                       0.052667
                                     1983
                                                                              0
                                                                       0.912762
                                                                       0.000203
                                                                       0.014845
                                                                       0.030096
                                                                       0.042094
                                     1984
                                                                              0
                                                                       0.932659
                                                                       0.000835
                                                                       0.009183
                                                                       0.036732
                                                                       0.020592
                                     1985
                                                                              0
                                                                       0.881042
                                                                       0.001474
                                                                       0.010761
                                                                       0.083285
                                                                       0.023438
                                     1986
                                                                              0
                                                                       0.855457
                                                                       0.013381
                                                                       0.022962
                                                                       0.089534
                                                                       0.018667
                                     1987
                                                                              0
                                                                       0.791731
                                                                       0.085493
                                                                       0.022498
                                                                       0.087164
                                                                       0.013113
                                     1988
                                                                              0
                                                                        0.72799
                                                                       0.148917
                                                                       0.015469
                                                                       0.093335
                                                                       0.014289
                                     1989
                                                                              0
                                                                        0.73298
                                                                       0.128665
                                                                       0.043052
                                                                       0.082792
                                                                       0.012511
                                     1990
                                                                              0
                                                                       0.173248
                                                                       0.614798
                                                                       0.043628
                                                                       0.149939
                                                                       0.018387
                                     1991
                                                                              0
                                                                              0
                                                                       0.619344
                                                                       0.063712
                                                                       0.296399
                                                                       0.020545
                                     1992
                                                                              0
                                                                              0
                                                                       0.551548
                                                                        0.01901
                                                                       0.385085
                                                                       0.044356
                                     1993
                                                                              0
                                                                              0
                                                                       0.345775
                                                                       0.471873
                                                                       0.144844
                                                                       0.037509
                                     1994
                                                                              0
                                                                              0
                                                                        0.45546
                                                                       0.354386
                                                                       0.159622
                                                                       0.030531
                                     1995
                                                                              0
                                                                              0
                                                                       0.635861
                                                                       0.163195
                                                                        0.17468
                                                                       0.026264
                                     1996
                                                                              0
                                                                              0
                                                                       0.553807
                                                                       0.229529
                                                                       0.184208
                                                                       0.032456
                                     1997
                                                                              0
                                                                              0
                                                                       0.666905
                                                                       0.193167
                                                                       0.111299
                                                                       0.028628
                                     1998
                                                                              0
                                                                              0
                                                                          0.267
                                                                       0.335069
                                                                       0.357508
                                                                       0.040423
                                     1999+
                                                                              0
                                                                              0
                                                                              0
                                                                       0.736656
                                                                       0.233886
                                                                       0.029458

      Table 21-9 Weight Fractions for Gasoline Motor Homes by Model Year
                                 Polk GVW bin
                                       3
                                       4
                                       5
                                       6
                                       7
                                       8
                              MOVES weight class
                                      140
                                      160
                                      195
                                      260
                                      330
                                      400
                                  Model Year
                                   Gasoline
                               1975-and-earlier
                                                                              1
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1976
                                                                              1
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1977
                                                                              1
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1978
                                                                              1
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1979
                                                                              1
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1980
                                                                              1
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1981
                                                                       0.747723
                                                                       0.252277
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1982
                                                                       0.732235
                                                                       0.267765
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1983
                                                                       0.714552
                                                                       0.285448
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1984
                                                                       0.641577
                                                                       0.358423
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1985
                                                                       0.692314
                                                                       0.307686
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1986
                                                                       0.720248
                                                                       0.279752
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1987
                                                                       0.606635
                                                                       0.393365
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1988
                                                                       0.459429
                                                                       0.540571
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1989
                                                                       0.551601
                                                                       0.448399
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1990
                                                                       0.543354
                                                                       0.456646
                                                                              0
                                                                              0
                                                                              0
                                                                              0
                                     1991
                                                                       0.612025
                                                                       0.322022
                                                                       0.065952
                                                                              0
                                                                              0
                                                                              0
                                     1992
                                                                        0.54464
                                                                       0.373999
                                                                       0.081361
                                                                              0
                                                                              0
                                                                              0
                                     1993
                                                                       0.583788
                                                                       0.361277
                                                                       0.054935
                                                                              0
                                                                              0
                                                                              0
                                     1994
                                                                       0.481099
                                                                       0.361146
                                                                       0.157755
                                                                              0
                                                                              0
                                                                              0
                                     1995
                                                                        0.52997
                                                                       0.198479
                                                                       0.271551
                                                                              0
                                                                              0
                                                                              0
                                     1996
                                                                       0.435959
                                                                       0.289453
                                                                       0.274588
                                                                              0
                                                                              0
                                                                              0
                                     1997
                                                                       0.221675
                                                                       0.433334
                                                                       0.344991
                                                                              0
                                                                              0
                                                                              0
                                     1998
                                                                       0.288222
                                                                       0.581599
                                                                        0.13018
                                                                              0
                                                                              0
                                                                              0
                                     1999+
                                                                       0.170133
                                                                       0.392451
                                                                       0.288411
                                                                       0.149004
                                                                              0
                                                                              0

 References