Interstate 29 in South Dakota

Interstate 29
Interstate 29
	I-29 highlighted in red
Route information
	Maintained by SDDOT
Length	252.50 mi (406.36 km)
NHS	Entire route
Major junctions
South end	I-29 at Iowa state line
	US 18 concurrency near Canton; I-229 in Sioux Falls; I-90 near Sioux Falls; US 14 in Brookings; US 212 in Watertown; US 81 near Watertown; US 12 near Summit;
North end	I-29 / US 81 at North Dakota state line
Location
Country	United States
State	South Dakota
Counties	Union, Lincoln, Minnehaha, Moody, Brookings, Deuel, Hamlin, Codington, Grant, Roberts
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; South Dakota State Trunk Highway System; Interstate; US; State;

Interstate 29 (I-29) is a north–south Interstate Highway in the midwestern United States. In the state of South Dakota, I-29 traverses on the eastern side of the state from the Iowa border near Sioux City to the North Dakota border near New Effington. On its route, I-29 passes through western portions of Sioux Falls, the state's largest city. It travels 252.5 miles (406.4 km) in the state, the longest stretch of any of the four states through which it passes.^[1] I-229, the highway's lone auxiliary route in South Dakota, serves as a bypass around southern and eastern Sioux Falls.

^ ^a ^b "Main Routes of the Eisenhower National System of Interstate and Defense Highways". Federal Highway Administration. Retrieved October 28, 2012.

[;fhwa-1] "Main Routes of the Eisenhower National System of Interstate and Defense Highways". Federal Highway Administration. Retrieved October 28, 2012.

[1]