Interstate 29 in Missouri

Interstate 29 is a north–south Interstate Highway in the Midwestern United States that begins in Missouri. It travels through the Kansas City and St. Joseph metropolitan areas before exiting the state and entering Iowa. Almost all of I-29 in Missouri lies in an area called the Platte Purchase that was not originally part of Missouri when the state entered the Union in 1821.

Route description

I-29 begins at I-70 in Kansas City in a concurrency with I-35 and U.S. Route 71 at the Downtown Loop. It crosses over the Missouri River via the Bond Bridge. I-29 and I-35 separate in northern Kansas City, with I-29 turning northwest with US 71 running concurrent with it. It passes near Kansas City International Airport and near there is concurrent with I-435. I-29 then exits the Kansas City area. It enters the eastern portion of St. Joseph while downtown St. Joseph is served by I-229, a loop of I-29. North of St. Joseph, US 71 separates from I-29 and heads north. I-29 then passes through rural areas of northwestern Missouri on a southeast-to-northwest alignment. After Exit 79 which serves U.S. 159, I-29 descends a hill to the valley of the Missouri River and the base of the Loess Hills, and remains mainly flat for the remainder of its route in Missouri, its entire route in Iowa and for about 35 miles in South Dakota. I-29 then crosses into Iowa north of Rock Port, approximately south of Council Bluffs.

During the 2019 Midwestern US floods, I-29 in Missouri was closed to traffic in both directions from St. Joseph to Council Bluffs, Iowa when the highway got flooded. It reopened to traffic by October 2019.

I-29 has one auxiliary route in Missouri: