 |
  Standard South Dakota highway shields | |
| System information | |
|---|---|
| Notes | South Dakota highways are generally state-maintained. |
| Highway names | |
| Interstates | Interstate X (I-X) |
| US Highways | U.S. Highway X (US X) |
| State | (State) Highway X (SD X) |
| System links | |
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The U.S. Highways in South Dakota are the segments of the United States Numbered Highway System owned and maintained by the South Dakota Department of Transportation in the US state of South Dakota.
| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 US 12 | 319.24 | 513.77 | US 12 near Lemmon | US 12 at Big Stone City | 1926 | current | ||
 US 14 | 439.75 | 707.71 | I-90/US 14 near Spearfish | US 14 near Elkton | 1925 | current | ||
 US 16 | 69 | 111 | US 16 near Mount Rushmore | I-90/I-190/US 14 in Rapid City | 1925 | current | ||
 US 18 | 451.88 | 727.23 | US 18 near Edgemont | US 18 near Canton | 1926 | current | ||
 US 77 | — | — | — | — | 1929 | 1982 | ||
 US 81 | — | — | US 81 at Yankton | I-29/US 81 near New Effington | 1926 | current | ||
 US 83 | — | — | US 83 near Olsonville | US 83 near Herreid | 1925 | current | ||
 US 85 | — | — | US 85 in the Black Hills region | US 85 near Ludlow | 1926 | current | ||
 US 85E | — | — | — | — | 1931 | 1937 | ||
 US 183 | 75.17 | 120.97 | US 183 near Wewela | I-90 near Presho | 1926 | current | ||
 US 212 | — | — | US 212 near Belle Fourche | US 212 east of Watertown | 1925 | current | ||
 US 216 | — | — | — | — | 1933 | 1934 | ||
 US 281 | — | — | US 281 in Gregory County | US 281 north of Frederick | 1926 | current | ||
 US 385 | 122 | 196 | US 385 south of Oelrichs | US 85 in Deadwood | 1925 | current | ||
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| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 US 14A | — | — | I-90 / I-90 Bus. / US 14 / US 85 in Spearfish | I-90 / I-90 Bus. / US 14 / SD 34 / SD 79 in Sturgis | — | — | ||
 US 16A | 36.971 | 59.499 | US 16/US 385/SD 89 in Custer | US 16 near Keystone | — | — | ||
 US 85A | — | — | — | — | — | — | ||
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Interstate 29 (I-29) is an Interstate Highway in the Midwestern United States. I-29 runs from Kansas City, Missouri, at a junction with I-35 and I-70, to the Canada–US border near Pembina, North Dakota, where it connects with Manitoba Provincial Trunk Highway 75 (PTH 75), which continues on to Winnipeg. The road follows the course of three major rivers, all of which form the borders of US states. The southern portion of I-29 closely parallels the Missouri River from Kansas City northward to Sioux City, Iowa, where it crosses and then parallels the Big Sioux River. For the northern third of the highway, it closely follows the Red River of the North. The major cities that I-29 connects to includes Council Bluffs, Iowa; Sioux City, Iowa; Sioux Falls, South Dakota; Fargo, North Dakota; and Grand Forks, North Dakota.
U.S. Route 12 or U.S. Highway 12 (US 12) is an east–west United States Numbered Highway, running from Aberdeen, Washington, to Detroit, Michigan, for almost 2,500 miles (4,000 km). The highway has mostly been superseded by Interstate 90 (I-90) and I-94, but, unlike most U.S. Highways that have been superseded by an Interstate, US 12 remains intact as an important link for local and regional destinations. The highway's western terminus in Aberdeen is at an intersection with US 101, while the highway's eastern terminus in Downtown Detroit is at the corner of Michigan and Cass avenues, near Campus Martius Park.
U.S. Route 14 or U.S. Highway 14 (US 14), an east–west route, is one of the original United States Numbered Highways of 1926. It currently has a length of about 1,445 miles (2,326 km), for much of which it runs roughly parallel to Interstate 90 (I-90).
U.S. Route 77 is a major north–south United States Numbered Highway which extends for 1,305 miles (2,100 km) in the central United States. As of 2005, Its southern terminus is in Brownsville, Texas, at Veteran's International Bridge on the Mexican border, where it connects with both Mexican Federal Highway 101 and Mexican Federal Highway 180, and the highway's northern terminus is in Sioux City, Iowa, at an interchange with Interstate 29 (I-29), less than 1⁄2 mile (800 m) north of the Nebraska state line.
U.S. Route 81 or U.S. Highway 81 (US 81) is a major north–south U.S. highway that extends for 1,220 miles (1,960 km) in the central United States and is one of the original United States Numbered Highways established in 1926 by the American Association of State Highway Officials.
U.S. Route 281 (US 281) is a north–south United States Numbered Highway. At 1,875 miles (3,018 km) it is the longest continuous three-digit U.S. Route.
U.S. Route 83 (US 83) is a major north–south United States Numbered Highway that extends 1,885 miles (3,034 km) in the central United States. Only four other north–south routes are longer: US 1, US 41, US 59, and US 87, while US 83 follows a straighter north-south path than all of these. Nearly half of its mileage is in the state of Texas. The highway's northern terminus is north of Westhope, North Dakota, at the Canadian border, where it continues as Manitoba Highway 83 (PTH 83). The southern terminus is at the Veterans International Bridge in Brownsville, Texas. Together, US 83 and PTH 83 form a continuously numbered north-south highway with a combined distance of 3,450 kilometres (2,140 mi).
U.S. Route 183 (US 183) is a north–south United States highway. The highway's northern terminus is in Presho, South Dakota, at an intersection with Interstate 90. Its southern terminus is in Refugio, Texas, at the southern intersection of U.S. Highway 77 and Alternate US 77.
U.S. Highway 16 (US 16) is an east–west United States Numbered Highway between Rapid City, South Dakota, and Yellowstone National Park in Wyoming. The highway's eastern terminus is at a junction with Interstate 90 (I-90)/US 14, concurrent with I-190, in Rapid City. The western terminus is the east entrance to Yellowstone National Park, concurrent with US 14 and US 20. US 16 used to extend all the way to Michigan but has been truncated in favor of I-90 and I-96.
U.S. Highway 18 (US 18) is an east–west United States Numbered Highway in the Midwestern United States. The western terminus is in Orin, Wyoming, at an interchange with Interstate 25 (I-25). Its eastern terminus is in Downtown Milwaukee, Wisconsin. US 18, however, runs concurrent with other U.S. Highways from its western terminus to Mule Creek Junction, Wyoming. US 18 is one of the original U.S. Highways of 1926. The US 18 designation was originally proposed for a road in Michigan from Grand Haven east to Detroit. This roadway was eventually designated as US 16.
U.S. Route 85 (US 85) is a 1,479-mile-long (2,380 km) north–south United States Highway that travels in the Mountain and Northern Plains states of the United States. The southern terminus of the highway is at the Mexican border in El Paso, Texas, connecting with Mexican Federal Highway 45. The northern terminus is at the Canadian border in Fortuna, North Dakota, where the route continues north as Saskatchewan Highway 35. The highway route is part of the CanAm Highway. Sections of US 85 are designated as the Theodore Roosevelt Expressway.
U.S. Route 212 (US 212) is a spur of US 12. It runs for 949 miles (1,527 km) from Yellowstone National Park to Minnesota Highway 62 at Edina, Minnesota. It does not intersect US 12 now, but it once had an eastern terminus at US 12 in St. Paul, Minnesota. US 212 passes through the states of Minnesota, South Dakota, Wyoming, and Montana. It goes through the cities of Watertown, South Dakota and Billings, Montana.
U.S. Route 385 (US 385) is a spur of U.S. Route 85 that runs for 1,206 miles (1,941 km) from Deadwood, South Dakota to Big Bend National Park in Texas.
U.S. Highway 16A (US 16A) is a 36.971-mile-long (59.499 km) scenic United States Numbered Highway. It is an alternate route for US 16. It splits from US 16 in the Black Hills of the southwestern part of the U.S. state of South Dakota. The highway's western terminus is an intersection with US 16, US 385, and South Dakota Highway 89 (SD 89) in Custer. The eastern terminus is at an interchange with US 16 called Keystone Wye south of Rapid City. Portions of US 16A are known as the Iron Mountain Road, named after the peak it summits.
South Dakota Highway 87 (SD 87) is a 37.894-mile-long (60.984 km) state highway in the southwestern part of the U.S. state of South Dakota. It travels through the Black Hills region. The highway's southern terminus is at an intersection with U.S. Route 385 (US 385), about 6 miles (9.7 km) southeast of Pringle, within the southwestern part of Wind Cave National Park. Its northern terminus is at an intersection with US 16/US 385 about 3 miles (4.8 km) south-southwest of Hill City, within the east-central part of the Black Hills National Forest.
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.
This article describes transportation in the U.S. state of South Dakota.
U.S. Highway 16 (US 16) is a 69-mile-long (111 km) east–west United States Numbered Highway in the western part of the state of South Dakota. It travels between Yellowstone National Park near Newcastle, Wyoming and Interstate 90 (I-90) in Rapid City.
Media related to Interstate Highways in South Dakota at Wikimedia Commons