Business Loop I-229

South Dakota Highway 42Business Loop I-229South Dakota Highway 115

One of the few 3-digit Interstate business routes in the system, Downtown Loop I-229 through Sioux Falls is a locally maintained route joining the city center with I-229 to the south and east. The 4.3 mile loop runs north along Minnesota Avenue (old U.S. 77) alongside SD 115 to the one-way couplet of 10th and 11th Streets in Downtown. There Business Spur I-29 west and Business Spur I-90 north begin as Downtown Loop I-229 turns east alongside SD 42. 10th and 11th Streets combine into a five-lane boulevard east of the viaducts over the BNSF Railroad and Big Sioux River through the Whittier neighborhood and back to Interstate 229.

Minnesota Avenue was signed as U.S. 77 until 1981, when the route was downgraded to SD 115 between U.S. 18 and Dell Rapids. The route through the city of Sioux Falls is locally maintained. U.S. 16 was truncated east of Sioux Falls in 1979 and decommissioned east of Rapid City the following year. SD 42 replaced the easternmost portion of the route. The highway is state maintained outside the Sioux Falls city limits.

Business Loop I-229 Guides

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Page Updated Tuesday July 19, 2016.