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The Interstate Highways in South Dakota are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owned and maintained by the South Dakota Department of Transportation in the US state of South Dakota.
Map showing the interstates and primary highways in South Dakota. South Dakota has a total of 83,609 miles (134,556 km) of highways, roads, and streets, along with 679 miles (1,093 km) of interstate highways. [1] South Dakota and Montana are the only states sharing a land border which is not traversed by a paved road.
The highways travel concurrently to east-southeast of Wall, South Dakota. South Dakota US 85 in North Spearfish. The highways travel concurrently to Spearfish. I-190 / US 16 in Rapid City US 83 in Fort Pierre. The highways travel concurrently to west-southwest of Blunt. US 281 north-northwest of Wolsey. The highways travel concurrently to south ...
The South Dakota section of US 14 enters the state from Wyoming concurrent with Interstate 90 (I-90). It passes through Spearfish , Sturgis , Rapid City , and Wall , before leaving I-90. US 14 then passes through Philip , Midland , Pierre , Highmore , Miller , Wolsey , Huron , De Smet , Arlington , and Brookings , then leaving the state at the ...
South Dakota's state highways were assigned in a numbering pattern that followed that of the U.S. Highways followed upon their inception. East–west highways carried even numbers and increased from North to South – while north–south highways carried odd numbers and increased from east to west. This holds true only for two-digit highways.
There are 71 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. These primary highways are assigned one- or two-digit route numbers, whereas their associated auxiliary Interstate Highways receive three-digit route numbers. Typically, odd-numbered Interstates run south–north, with lower ...
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
The Pershing Map FDR's hand-drawn map from 1938. The United States government's efforts to construct a national network of highways began on an ad hoc basis with the passage of the Federal Aid Road Act of 1916, which provided $75 million over a five-year period for matching funds to the states for the construction and improvement of highways. [8]