Editing Interstate 29 (section)

===South Dakota===
{{main|Interstate 29 in South Dakota}}
I-29 enters South Dakota at [[North Sioux City, South Dakota|North Sioux City]] by crossing over the [[Big Sioux River]]. It runs northwest until its interchange with [[South Dakota Highway 50|Highway&nbsp;50]] (SD&nbsp;50) near [[Vermillion, South Dakota|Vermillion]], where it turns north. The highway alignment is due north until just before [[Sioux Falls, South Dakota|Sioux Falls]]. In the Sioux Falls area, I-29 serves the western part of Sioux Falls while [[Interstate 229 (South Dakota)|I-229]] spurs off and serves eastern Sioux Falls. In northwestern Sioux Falls, I-29 meets [[Interstate 90 in South Dakota|I-90]]. After that, it continues north past [[Brookings, South Dakota|Brookings]] and an intersection with [[U.S. Route 14 in South Dakota|US&nbsp;14]]. At the intersection with [[South Dakota Highway 28|SD&nbsp;28]], I-29 turns northwest toward [[Watertown, South Dakota|Watertown]]. After Watertown, the highway continues north and passes an intersection with [[U.S. Route 12 in South Dakota|US&nbsp;12]] before continuing into [[North Dakota]].