michigan highway north south state trunkline highway southwestern portion state michigan southern terminus connection state road michigan indiana state line near indiana trunkline runs north interchange highway route bus north highway runs parallel river rail line rural areas northern terminus interstate west highways bore designation connected holland birth highway system creation number moved different highway thumb area second highway scaled later decommissioned 1960s current highway dates southern end rerouted previous alignment given moniker extended state line complete current highway route description starts indiana state line continuation michigan trunkline runs north residential areas 11th street south town meets interchange continuing northward commercial areas intersections maple main streets splits way pair streets follow 12th street northbound 11th street southbound oak street marks western end bus turns westward main street downtown 5th street highway turns north exit downtown highway crosses rail line owned amtrak curving northeasterly near park golf course angles parallel amtrak line highway crosses landscape transitions farmland river highway turns east past turns northeasterly highway reaches city merges highways run concurrently eastward spruce main division streets downtown turns north street separating concurrency leaving downtown north town rural intersects near location highway crosses north intersection trunkline crosses van county turns east passes south turn northeasterly parallel rail line delaware street heads north maintained mdot like state highways michigan maintenance responsibilities department tracks volume traffic uses roadways jurisdiction volumes expressed metric called annual average daily traffic statistical calculation average daily number vehicles segment roadway mdot surveys showed highest traffic levels vehicles daily south lowest counts vehicles day west state line listed national_highway_system network roads important country economy defense mobility history previous designations state highway system originally signed initially designated holland highway ran route road 32nd avenue connect port street connecting chicago drive highway course simplified use chicago drive highway system debuted original renumbered extension number reused original thumb highway ran port west designation port removed late remainder removed current designation south reassigned designation shifted east routing contemporary intersection near routing extended state line april decommissioned state michigan extension formed concurrency bus process early central section bus transferred city bus designation decommissioned city removing designation concurrency major intersections
M-51 (Michigan highway)