.svg) Interstate 29 | ||||
|---|---|---|---|---|
 I-29 highlighted in red | ||||
| Route information | ||||
| Maintained by Iowa DOT | ||||
| Length | 151.826 mi[1] (244.340 km) | |||
| Existed | October 1, 1958[2]–present | |||
| History | Under construction 1958–1972 | |||
| Tourist routes |  Lewis and Clark Trail | |||
| NHS | Entire route | |||
| Major junctions | ||||
| South end |  I-29 near Hamburg | |||
| North end | I-29 at Sioux City | |||
| Location | ||||
| Country | United States | |||
| State | Iowa | |||
| Counties | ||||
| Highway system | ||||
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In the US state of Iowa, Interstate 29 (I-29) is a north–south Interstate Highway which closely parallels the Missouri River. I-29 enters Iowa from Missouri near Hamburg and heads to the north-northwest through the Omaha–Council Bluffs and the Sioux City areas. It exits the state by crossing the Big Sioux River into South Dakota. For its entire distance through the state, it runs on the flat land between the Missouri River and the Loess Hills.
I-29 was built in sections over a period of 15 years. When there was a shortage of male workers, female workers stepped in to build a 20-mile (32 km) section near Missouri Valley. Between Council Bluffs and Sioux City, I-29 replaced U.S. Highway 75 (US 75) as the major route in western Iowa. As a result of I-29's creation, US 75 south of Sioux City was relocated into Nebraska.
- ^ 2009 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2009. Retrieved September 8, 2010.
- ^ Completion Map of Interstate System (PDF) (Map). Iowa Department of Transportation. January 1, 1982. Archived from the original (PDF) on September 29, 2011. Retrieved September 8, 2010.