BackgroundInterstate 29 is an important north/south route extending through the Midwest United States. The 755.51-mile route begins in Kansas City, Mo., at the junction with I-35/70 and continues through several major urban areas including Council Bluffs and Sioux City, Iowa; Sioux Falls, S.D.; Fargo, N.D.; and then to the Canadian border near Pembina, N.D.; where it connects with Manitoba Provincial Highway 75 via the short Manitoba Provincial Highway 29
The portion of the interstate within Sioux City was first opened to traffic in 1961. Since 1961, no major roadway improvements have occurred, except for resurfacing projects that occurred in 1970 and 2002.
Realizing that the I-29 Sioux City corridor would soon be a half-century old, the Iowa Department of Transportation, in conjunction with the Siouxland Interstate Metropolitan Planning Council (SIMPCO) and city of Sioux City, commissioned several studies to learn more about the functional needs of the corridor. These studies resulted in a final report in 1997 that drew attention to the need for numerous improvements to the corridor.A portion of the 1997 needs study identified projects that included replacement of exit 141 (Sergeant Bluff/airport interchange), and that project was completed in 2003. The I-29 Sioux City corridor planning study effort began in 2004 with the first construction project beginning in August 2008 at the Riverside Boulevard interchange. Completion of the I-29 corridor is currently anticipated in 2019.