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Road construction in the 1990s and early 2000s consisted of twinning the existing two-lane road. In 1992, the Iowa DOT announced $173 million was allocated for highway projects across the state, $50 million of which was planned for widening US 61 (equivalent to $337 million and $97.5 million, respectively, in 2023 [14]). [92]
It cited a statistic that suggested a highway with over daily traffic of over 4000 vehicles should be expanded to four lanes. On US 63, the highway commission's count in 1956 found that 4430 vehicles north of Waterloo and 2490 vehicles south of the city used the highway daily. Traffic on US 63 had nearly doubled since the previous count in 1954 ...
The Fred Schwengel Memorial Bridge is a 4-lane steel girder bridge that carries Interstate 80 across the Mississippi River between LeClaire, Iowa and Rapids City, Illinois. The bridge is named for Fred Schwengel, a former U.S. Representative from Davenport, Iowa and one of the driving forces behind the Interstate Highway Act. [3]
Some counties and the state could never come to an agreement, as was the case in Johnson County regarding Iowa Highway 979 (Iowa 979). The DOT wanted Johnson County to take over maintenance of the 6-mile-long (9.7 km) road and offered $160,000 to repair the road (equivalent to $400,000 in 2023 [ 4 ] ), while the county wanted the state to take ...
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.
Iowa Highway 127: US 30 in Logan Endpoints within city limits but on the edge of the city or town 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
A $13.4 million construction project was completed in northern Lake County on a four-mile (6.4 km) section of IL 83 from Petite Lake Road to the Wisconsin state line. Changes included adding a center turn lane and intersection reconfigurations at Grass Lake Road, IL 173, and North Avenue. The project was completed in fall 2010.
In March 2021, the Iowa DOT began a project to improve the I-29/I-480/West Broadway System Interchange at I-480's eastern terminus. The project was done to improve traffic flow, safety, and the functional design at that interchange as well as at the adjacent I-29 interchanges at 41st Street, 35th Street, Avenue G and 9th Avenue.