Interstate 29
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| Route information | |
| Length: | 750.58 mi (1,207.94 km) |
| Major junctions | |
| South end: |
    I-35 / I-70 / US 71 / US 40 in Kansas City, MO
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 I-80 in Council Bluffs, IA I-90 near Sioux Falls, SD I-94 in Fargo, ND
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| North end: |
 US 81 /  PTH 75 at Pembina–Emerson Border Crossing
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| Location | |
| States: | Missouri, Iowa, South Dakota, North Dakota |
| Highway system | |
Interstate 29 (I-29) is an Interstate Highway in the Midwestern United States. I-29 runs from Kansas City, Missouri, at a junction with Interstate 35 and Interstate 70, to the Canada–US border near Pembina, North Dakota, where it connects with Manitoba Highway 75.
The road follows the course of three major rivers, all of which form the borders of U.S. states. The southern portion of I-29 closely parallels the Missouri River from Kansas City northward to Sioux City, Iowa, where it crosses and then parallels the Big Sioux River. For the northern third of the highway, it closely follows the Red River of the North.
Residents of Missouri, Arkansas and Louisiana began campaigning in 1965 via the "US 71 - I-29 Association" to extend the highway all the way to New Orleans, Louisiana following the US 71 corridor. The campaign would create a limited access highway from New Orleans to Canada and on to Winnipeg. That extension would be called Interstate 49 which was not part of the 1957 master plan. It is named 49 instead of 29 because of interstate naming rules. The rules state that north-south roads are odd numbered and the highways are named in increasing order from west to east. Since there are an Interstate 35 and an Interstate 45 to the west and an Interstate 55 to the east Interstate 49 was chosen for the name. Interstate 35 angles from the west to the east side of I-29 from its origin in Kansas City. The next interstate on the west side is Interstate 25 in Colorado and Wyoming and hence the 29 designation by naming rules.
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Wikipedia