Interstate Highways in South Dakota
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The shields of South Dakota's primary and auxiliary Interstate highways. |
There are three primary Interstate highways and two auxiliary Interstate highways in South Dakota.
Interstate 27 (I-27) - Runs from the Nebraska state line north of Valentine, NE to the North Dakota state line north of Herreid, SD.
Interstate 29 (I-29) - Runs from the Iowa state line on the Big Sioux River at Dakota Dunes, SD to the North Dakota state line north-northwest of Victor, SD.
Interstate 90 (I-90) - Runs from the Wyoming state line west-northwest of North Spearfish, SD to the Minnesota state line north-northeast of Valley Springs, SD.
Interstate 190 (I-190) - Runs from I-90, US 14/16 and South Dakota Highway 79 in Rapid City to US 14, South Dakota Highway 44 and West Boulevard in Rapid City.
Interstate 229 (I-229) - Runs from I-29 in Sioux Falls to I-90 and County Route 125 (Minnehaha County, SD) north of Sioux Falls.
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