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The Iowa Department of Transportation is responsible for the day-to-day maintenance of the primary highway system, which consists of Interstate Highways, United States Highways, and Iowa state highways. Currently, the longest primary highway is U.S. Highway 30 at 332 miles (534 km). The shortest highway is Interstate 129 at 0.27 miles (430 m).
Number Length (mi) [2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes I-80N: 17.102: 27.523 I-29 at Loveland: I-80 near Neola: 1966
U.S. Highway 63 was designated along Primary Roads No. 13, 24, and 2, which was the Daniel Boone Trail from Missouri to Des Moines. [6] Once the U.S. Highway System was established, the automobile association-sponsored roads gradually disappeared. [8] A map of Iowa's U.S. Highways as laid out in 1926
The Iowa DOT and Iowa 511 can help you check road conditions and plan for save travel during snowstorms. ... of snow plows through the Iowa DOT's map. The map is updated every two minutes for snow ...
Former route of Iowa 141; now County Roads E60 and N33 Iowa 162: 2.660: 4.281 Pammel State Park: Iowa 92 in Madison County: 1930: 1982 Park access road; renumbered Iowa 322 to avoid confusion with nearby US 169 Iowa 162: 2.0: 3.2 US 18 in Charles City: US 218 in Charles City 2000: 2006
United States Numbered Highways of the Iowa Primary Highway System Highway markers from different years for former US 32 (1926), US 75 (1961) and current US 151 (1971) U.S. Highways in Iowa highlighted in red
The current Iowa 1 was designated in the 1926 Iowa highway renumbering, extending from Iowa 3 near Keosauqua to US 32 in Iowa City as a renumbering of a portion of Primary Road No. 11. [3] Iowa 3 was renumbered Iowa 2 in 1941 to match Nebraska's highway. In 1930, it extended east to Iowa 38 in Rochester; it replaced Iowa 139. [4]
Iowa Highway 130: I-80 / US 61 at Davenport Endpoints at highways in unincorporated areas Iowa Highway 1: US 151 near Anamosa Endpoints at state lines, continuing as numbered highway U.S. Route 20 in Iowa: US 20 at the Illinois state line Endpoints at unnumbered (town/city/county) roads in minor town/city limits Iowa Highway 85: Montezuma city ...