South Dakota Highway 40A

Infobox road
state=SD
marker_

highway_name=Highway 40A "(Historic)"
length_mi=2
established=1970
decommissioned=1976
direction_a=West
starting_terminus= Interior
direction_b=East
ending_terminus=Alternate Cedar Pass
cities=
previous_type=SD
previous_route=40
next_type=SD
next_route=41

South Dakota Highway 40A was a short spur route in the east part of Badlands National Park.

History

This route was originally part of South Dakota Highway 40. At that time, SD 40 exited the park to the northeast, and continued east with U.S. Highway 16.

Around 1970, SD 40 was rerouted south from the park to a new alignment south of the White River. When this was done, SD 40A was created to link with Alternate U.S. Highway 16.

In 1976, this route was redesignated as South Dakota Highway 377.

External resources

* [http://www.northernplainshighways.org/sdakota/sd31-60.html#Old%20SD-40A South Dakota Highways Page: Highways 31-60]