List of South Dakota Numbered Highways

List Of South Dakota Numbered Highways

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 2-digit highways. 3-digit highways follow the odd-even routing, but do not sequentially remain near a "parent" route as a spur or alternate route, instead being more independent of any parent 2d route.

The Bureau of Indian Affairs maintains a set of routes within the reservations of western South Dakota – using the standard BIA shield on green background.

Decommissioned highway numbers are listed in italics.

Read more about List Of South Dakota Numbered Highways:  Interstate Highways, U.S. Highways

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