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Now local roads and County Road B35 Iowa 107: 27.579: 44.384 Iowa 3 near Alexander: CR B35 near Clear Lake: 1920: 2011 All but parts in Meservey and Thornton removed in 2003; now County Roads S25, B65 and S14 Iowa 108: 1.18: 1.90 Delta: Iowa 92 near Delta 1923: 1980 Spur route; now County Road V33 and Iowa 21 Iowa 109
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 primary highway system makes up over 9,000 miles (14,000 km), approximately 8 percent of the U.S. state of Iowa's public road system. 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.
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
The Iowa Department of Transportation maintains a system of state highways, usually called Iowa Highways. Within the State of Iowa, state route markers consist of a white circle against a black background, with a black route number in the center. U.S. and Interstate highways are also classified as state highways in Iowa.
The Iowa State Highway Commission chose to renumber a few highways as to not have conflicting route numbers along important routes. 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 ]
All three sections were originally kept as state highways, but, in 1991, when Iowa DOT first showed the new state highways' designations on the state highway map, the central section already had been turned over to Polk and Jasper counties. The western segment was numbered Iowa 925 and the eastern segment Iowa 927. [41]
Iowa Highway 3 (Iowa 3) is a state highway that runs from east to west across the state of Iowa.It is the longest state highway in Iowa, at 323 miles (520 km) long. Iowa 3 begins at the South Dakota state line where it continues as South Dakota Highway 50 and ends at the Northwest Arterial at the Dubuque city limits.