- Source: U.S. Route 12 in South Dakota
U.S. Highway 12 (US 12) is a part of the United States Numbered Highway System that travels from Aberdeen, Washington, to Detroit, Michigan. In the state of South Dakota, US 12 extends from the North Dakota border east to the Minnesota border.
Route description
US 12 enters South Dakota from North Dakota as a rural two-lane highway about 10 miles (16 km) west-northwest of Lemmon before entering the Standing Rock Indian Reservation. For approximately the next 70 miles (110 km), US 12 runs parallel to the border of North Dakota, sometimes within less than a mile (1.6 km). At Walker, US 12 heads southeast for 37 miles (60 km), where it crosses the Missouri River at Mobridge, exiting the reservation. From there, it continues east for 18 miles (29 km), until it meets with US 83 near Selby. It overlaps US 83 for seven miles (11 km). After leaving US 83, it turns due east and spends about 80 miles (130 km) as a rural two-lane highway again. A few miles before reaching Aberdeen, it becomes an at-grade expressway. After the junction with US 281, it goes back to being two lanes for a few miles through Aberdeen and past Aberdeen Regional Airport, before once again becoming a four-lane expressway, until two miles (3.2 km) before Waubay. East of Waubay it becomes again an at-grade expressway until it meets with I-29 near Summit. The speed limit from Aberdeen to I-29 is 70 mph (110 km/h) except through the communities of Groton, Webster, and Waubay. From there, it heads southeast 22 miles (35 km) until Milbank. At Milbank, it continues east for 12 miles (19 km), until it crosses into Minnesota at Big Stone City, just south of Big Stone Lake.
The South Dakota section of US 12 is legally defined at South Dakota Codified Laws § 31-4-132.
History
Major intersections
See also
U.S. roads portal
References
External links
Aberdeen Region Highway Log
Mitchell Region Highway Log
Pierre Region Highway Log
Rapid City Region Highway Log
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- U.S. Route 12 in South Dakota
- U.S. Route 12
- U.S. Route 212
- U.S. Route 16
- U.S. Route 77
- U.S. Route 83
- U.S. Route 18 in South Dakota
- U.S. Route 81
- U.S. Route 85
- U.S. Route 281
