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Website. https://dot.sd.gov/. The South Dakota Department of Transportation (SDDOT) is a state government organization in charge of maintaining public roadways of the U.S. state of South Dakota. South Dakota has 82,447 miles of highways, roads and streets, as well as 5,905 bridges. The SDDOT is responsible for 7,830 miles of the roadway system.
SD 50 was designated on the route known as the Sunshine Highway. When it was formed in the 1920s, it traveled the entire length of southern South Dakota, from the Wyoming state line west of Edgemont, to the Iowa state line at Sioux City. When U.S. Route 18 (US 18) was designated in the late 1920s, it replaced the SD 50 designation from the ...
Just east of I-29 is where I-90 meets the northern terminus of I-229. East of Brandon and northeast of Valley Springs, it then ends its trip through South Dakota of 413 miles (665 km) before entering Minnesota and Rock County, just west of the towns of Beaver Creek and Manley. Since April 2015, the speed limit is 80 mph (130 km/h) between the ...
South Dakota Highway 52. South Dakota Highway 52 ( SD 52) is a state route that runs just north of the Missouri River, across southeast South Dakota. It begins at a junction with South Dakota Highway 37 north of Springfield, and terminates in Yankton at U.S. Highway 81, at the junction of 4th and Broadway Streets. It is 37 miles (60 km) in length.
South Dakota Highway 391 (SD 391) is a 3.362-mile-long (5.411 km) state highway in the southwestern part of the U.S. state of South Dakota. It travels from Nebraska Highway 27 (N-27) at the Nebraska state line, southeast of Denby, to U.S. Route 18 (US 18) east-southeast of Denby. The highway is located entirely within Oglala Lakota County and ...
State. ← SD 46. → SD 48. South Dakota Highway 47 ( SD 47) is a state route that runs north to south across the central portion of South Dakota. It begins at an unnumbered highway at the North Dakota border north of Eureka, and ends at the Nebraska border, where it becomes Nebraska Highway 137. It is just under 241 miles (388 km) in length.
State. ← SD 365. → US 385. South Dakota Highway 377 ( SD 377) is a 2.173-mile-long (3.497 km) state highway in Jackson County, South Dakota, United States. It begins at an intersection with SD 44 in Interior, and travels in a northeasterly direction to its northern terminus at the Interior Entrance Station for Badlands National Park . SD ...
SD 79's southern terminus is at Maverick Junction near Hot Springs, where it meets US 18 and US 385. SD 79 runs east of the Black Hills to Rapid City, where it joins US Route 16 Truck Bypass around the east side of Rapid City up to Interstate 90. The road continues north and runs concurrently with US 14 and Interstate 90 westbound toward Sturgis.