interstate utah interstate runs san_francisco california new_jersey portion highway state utah mile long northern state west east crosses state line nevada traverses larger great salt lake desert continues alongside corridor route passing enters short portion freeway concurrent downtown salt_lake_city bowl turns east mouth canyon travels mountain range intersects eastern end near turning northwest wyoming border near built corridor easternmost section follows historical routes construction controlled access highway began 1950s late 1970s freeway state utah completed half mile long section utah state route road salt lake city international airport piece nearly mile long freeway completed opened august miles site cross country milestone utah driving golden spike railroad summit average daily traffic volumes ranged vehicles freeway vehicles freeway bowl downtown salt_lake_city state highway known purple heart trail route description states passes mile long segment utah fourth shortest longest stretch single state mile long segment nebraska entire route listed national_highway_system system roads important nation economy defense mobility year conducts series surveys highways measure traffic volumes measure expressed terms average annual daily traffic aadt measure traffic volume average day year calculated vehicles traveled interchange vehicles highway bowl downtown salt_lake_city seven percent traffic recorded consisted trucks counts portion freeway utah freeway enters utah nevada city edge cities nevada accessible business loop utah interchange south highway closely follows historical routes western pacific railroad feather river route salt flats larger home land speed records accessible middle salt flats concrete sculpture metaphor stands westbound east bounded sides military training grounds corridor commercial traveling west freeway north small gap east highway passes located mountain ranges freeway arrives southern shore great salt lake closely follows shore western suburbs salt_lake_city historical routes route derived routed lake passing towns crossing great salt lake communities served respectively traversing neck views lake passing neck road proceeding north end salt_lake_city proceeding south end historically intersection separation intersection freeway corridor great salt lake north pond south considered largest open pit copper seen distance foot tall tallest structures united_states portion freeway passes historical site freeway enters alignment passes salt lake city international airport freeway slightly south leaves corridor leads temple square downtown salt_lake_city system briefly parallels traveling center concurrent interchanges south continues south miles passing western southern edges downtown salt_lake_city southern interchange includes 21st south freeway marks end concurrency known southwestern corner portion travels separating freeway continues easterly loosely following alignment south south neighborhood past sugar house park home clockwise terminus belt route continues canyon freeway joins historical route mouth canyon summit county line route enters canyon carries western slope lane freeway mountains elevation feet canyon summit named early early leader asked survey new route mountains replace route surveyed completed operated golden pass toll road canyon today bears unsuccessfully equivalent thousand build road sold equivalent thousand ramps wyoming port entry located utah january introduced variable speed limits canyon allowing speed limit mph normal mph depending weather traffic conditions summit lies mining town today better known ski resorts travels median paralleling highway southern end freeway turns north reaching following tributaries river dam reaching junction eastern terminus western section freeway follows canyon east reaches wyoming state line near forms northeastern border rich summit counties portion follows historical routes railroad rest area canyon east junction features signs pointing features obstacles pioneers railroad construction workers including partially demolished built canyon history earlier roads follows routes major auto trails state western utah follows historical route nevada state line junction near utah signed modern route salt_lake_city routed state route route utah generally derived route original route west salt_lake_city inaccessible original route proceeded southwest nevada area military bases area closed public bases established modern signing cities east salt_lake_city closely parallels original route route covered including toll road nevada state line salt_lake_city signed wyoming state line victory highway west east time route improved stretches graded road remained parts route near numbered highway near echo designated routed western portion current road utah state route number known originally numbered renumbering highways previously freeway legislative designation passage formed number designated controlled access highway state constructed segments starting late 1950s late 1970s utah portion gap western edge salt_lake_city largely complete half mile long section salt lake city international airport holds distinction final link freeway completed interstate highway design specifications require controlled access highway grade intersections section dedicated august completed interstate highway specifications mile long route san_francisco california new_jersey section completed close anniversary noted dedication considered milestone history highway construction united_states noted dedication miles south golden spike united_states laid original designation begins interchange echo designation changed transportation officials despite objections support legislative designation highway renumbering rebuilding portions began october point mile long stretch near road salt_lake_city estimated reconstruction federally funded highways state cost billion equivalent billion interchange proposed accommodate traffic winter olympics held city open november remainder opened early named highway purple heart trail honor wounded war veterans additional reconstruction work involved replacing bridges route installation sound barriers canyon exit list
Interstate 80 in Utah