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Interstate 29 in Missouri

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This article is about the section of Interstate 29 in Missouri. For the entire route, see Interstate 29.

Interstate 29 marker

Interstate 29

Map

I-29 highlighted in red

Route information
Maintained by MoDOT
Length128.710 mi[1] (207.139 km)
Existed1963–present
NHSEntire route
Major junctions
South endDowntown Loop (Kansas City)
North end I-29 at the Iowa state line in Hamburg, IA
Location
CountryUnited States
StateMissouri
CountiesJackson, Clay, Platte, Buchanan, Andrew, Holt, Atchison
Highway system
← Route 28→ Route 30

Interstate 29 (I-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.

I-29 begins at I-70 in Kansas City in a concurrency with I-35 and U.S. Route 71 (US 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 55 miles (89 km) 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:

  • I-229: A bypass around the west side of St. Joseph
  1. ^ The Iowa Department of Transportation signs the Lewis and Clark Trail on I-29 north of the state line. However, the Missouri Department of Transportation signs the trail on a route following US 59, Route 111, US 136, and US 275 from exit 67 to the Iowa state line.
  1. ^ a b c Missouri Department of Transportation (November 13, 2012). MoDOT HPMAPS (Map). Missouri Department of Transportation. Retrieved November 13, 2012.

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