interstate iowa state iowa interstate north south interstate highway closely parallels missouri river enters iowa missouri near hamburg heads north northwest areas exits state crossing entire distance state runs flat land built sections period years shortage male workers female workers stepped build mile section near replaced route major route western iowa result creation south relocated nebraska route description interstate enters iowa south hamburg interstate heads northwest meets iowa highway iowa diamond interchange hamburg continues northwest seven miles meets iowa miles east nebraska north iowa interchange interstate north interchanges serving spaced half miles interchange near joined north continue north routes meet iowa crosses nebraska providing access nebraska near splits away iowa interchange quarters mile north split interstate joined east interstate head west southern miles split interchange immediately crosses missouri river nebraska immediately turns north miles north modified interchange eastern end joined near crescent travel north miles splits east near continues north miles intersects north interstate turns northwest south meets western end iowa travels north miles iowa interchange passing north continues northwest miles meets western end iowa approaches metro area passes gateway airport sergeant bluff singing hills boulevard interchange northbound joined southbound bus mile later bus ends cloverleaf interchange eastern end interstate miles north interchange runs closely close feet interstate follows curve river turns west meets carries bus bus traffic directed interstate half mile exits interchange represents national northern end route continues west missouri follows shortly crosses iowa splits away north history began late 1950s area section open mile long stretch bridge opened october september extended april northbound directional spans collapsed state line result flooding bridge mile section opened november december sections connected creating miles continuous interstate highway shortage male workers women enlisted help build section women paid hourly hourly dollars wage men earned construction area completed route open year additional interchanges added areas thirty miles interstate constructed opened sections years section opened december expanded lanes near resulted rerouted miles rerouted interchange near northward iowa alignment turned mills built existing highways notably section opened rerouted construction connecting segments completed rerouted mid-1980s completely rerouted iowa instead extending corridor nebraska exit list
Interstate 29 in Iowa