&sq=&lang=&file=File:I-235_(IA).svg) Interstate 235 | ||||
|---|---|---|---|---|
| John MacVicar Freeway | ||||
 I-235 highlighted in red | ||||
| Route information | ||||
| Auxiliary route of I-35 | ||||
| Maintained by Iowa DOT | ||||
| Length | 13.78 mi[1] (22.18 km) | |||
| Existed | December 14, 1961[2]–present | |||
| NHS | Entire route | |||
| Major junctions | ||||
| West end |   I-35 / I-80 in West Des Moines | |||
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| East end | I-35 / I-80 in Ankeny | |||
| Location | ||||
| Country | United States | |||
| State | Iowa | |||
| Counties | Polk | |||
| Highway system | ||||
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Interstate 235 (I-235) in Iowa is an auxiliary Interstate Highway that runs just north of downtown Des Moines through the heart of the Des Moines metropolitan area. I-235 runs from the junction of I-35 and I-80 in West Des Moines to the separation of the same two Interstates in Ankeny. The highway is approximately 14 miles (23 km) long.
I-235, which had seen little improvement since its construction in the 1960s, was completely rebuilt and widened in a project that spanned most of the 2000s. Prior to the reconstruction, I-235 had two lanes in each direction with a third lane near downtown; the entire route now has at least three lanes of traffic in each direction, with an additional one or two lanes closer to the heart of the city. The modernized freeway now handles on average between 75,000 and 125,000 vehicles per day, making it the busiest highway in the state of Iowa.
- ^ Federal Highway Administration (October 31, 2006). "Route Log and Finder List - Interstate System - Table 2". Retrieved June 23, 2007.
- ^ Iowa Department of Transportation (1996). The National System of Interstate Defense Highways 1956–1996.