route iowa highway northernmost east west highway state iowa state highways iowa maintained enters state crossing travels miles connects highway leaves state mississippi_river prior route follows known primary road route description begins approximately miles east runs easterly rural northwestern corner state meets iowa provides access iowa south highway turns south heads highway crosses way hull west hull south turning east closer hull highway continues east crosses brien county western edge intersects business loop iowa routes head east diamond interchange iowa eastern town business loop ends highway roughly parallels minnesota briefly overlapped joins north leaves south continuing east passes enters north intersects routes head south town south routes come intersection route heads opposite direction east west east passes joined iowa north routes split iowa heads south continues east briefly heading south enter cylinder route curves east line intersection iowa near marks county line iowa follows mile splits away north northern edge highway meets eastern county line shared intersection iowa marks route northern end route passes meeting mile west garner highways split garner east garner route takes north northeasterly path goes skirts northern shore near northeastern shore lake enters city meets interstate iowa bus head east interchange interstate traffic follows southbound miles iowa avenue saints highway hitherto followed southbound follows eastbound routes lane controlled access highway follow path passes south meet bus exit floyd county line iowa limited access road angle slightly northeast passing floyd routes joined routes head south bypass intersect iowa western town degree curve east exit expressway leaves iowa continue southeastward briefly heads north bus routes meet northern end iowa splits away east cross heading east route enters passes way meets lane bypass western town routes head south miles splitting mile interchange eastern end iowa route turns travel east continuing east enter community miles reaches intersects iowa east town crosses area untouched ice age route turns northeast north meet southern routes head east turn south near leaves south heading northeast business loop goes towns mainline skirts business loop mainline foot bridge spans mississippi_river continues east wisconsin wisconsin highway begins state line history rest designated november known names state known primary road assigned route published state highway map route called began national park ended madison wisconsin encompassing primary road state pike registered april fell highway significant portion route paved remainder brien county miles paved seven years gap finished created miles continuous pavement seven years route mississippi_river primary road included mile long overlap near paved primary road known start world war remaining section wasn paved mile section west section completed years prior way vehicles traveling cross mississippi_river ferry changed identical suspension bridges built cross river prairie wisconsin built bridge feet long crossed main channel river divided foot long island causeway car cross bridges march users bridge pay toll july bridges remained use years replaced bypass built connect directly short road previously provided access bridge old alignment route bus construction began avenue saints corridor near new controlled access facility built south city east december section freeway opened realigned new road old alignment iowa highway end year lane expressway extended expressway carrying built rerouted expressway western end iowa moved interchange major intersections
U.S. Route 18 in Iowa