South Dakota Transportation

South Dakota Transportation

 South Dakota transportation is engineered by a skilful network of roadways and railroads. The airways connect South Dakota well with the rest of the world. Here is a brief description of the transportation of South Dakota.


Interstates and Highways

The total roadways of South Dakota sum to 83,609 miles (134,556 km) with all the highways, roads, and streets. The total length of the interstate highways is 679 miles (1,093 km).
The major interstates that pass through South Dakota are Interstate 90 running from east and west and the Interstate 29 that runs from north and south. The shorter interstates are the Interstate 190 which is a spur to the Rapid City and the Interstate 229 which is a loop around eastern and southern Sioux Falls.
The Interstate 29 runs through Watertown, Brookings, Sioux Falls, and Vermillion. The portion of the Interstate 90 that is within the state measures 413 miles (665 km). It crosses the Missouri River near Chamberlain. It crosses through the cities of Sioux Falls, Mitchell, Rapid City, Sturgis and Spearfish. It serves as the main route between the cities in the east and the national parks in the west. Some places of tourist interest that falls along its way are the Corn Palace in Mitchell and Wall Drug in Wall.
U.S. routes 12, 14, 16, 18, and 212 are the highways in South Dakota that runs from east to west. The routes US 81, 83, 85 and 281 run from north to south.
There are two national scenic byways in South Dakota. Those are the Peter Norbeck National Scenic Byway in the Black Hills and the Native American Scenic Byway running along the Missouri River
The other scenic byways of the state are Badlands Loop Scenic Byway, the Spearfish Canyon Scenic Byway, and the Wildlife Loop Road Scenic Byway.


The railroads also play a very important part in the South Dakota transportation. In older times, the Milwaukee Road and the Chicago & North Western were the largest railroads of the state.
In the latter half of the nineteenth century and early twentieth century, the railways underwent a major face lift and 4,420 miles (7,110 km) of railroad track were built. However, only 1,839 miles (2,960 km) are operational. The largest railway in Pennsylvania is BNSF Railway. The other major carrier of the state is the Eastern Railroad, operating through the Chicago & North Western trackage. South Dakota however does not have any Amtrak service.


The Sioux Falls Regional Airport and Rapid City Regional Airport are South Dakota's largest commercial airports. The major airlines services that operate are Northwest Airlines, Frontier Airlines, and Allegiant Airlines.

Laws and licenses of driving in South Dakota

For driving in South Dakota, the speed limit is 75 miles per hour (121 km/h) on rural interstates. It is applicable for any vehicle and any time of the day. The speed limit on urban interstates and other highways is 65 mph (105 km/h).
The license plates of the vehicles of South Dakota have the first number according to the county of origin.