| South Dakota Highway 40a |
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| CATEGORIES ABOUT SOUTH DAKOTA HIGHWAY 40A | |
| state highways in south dakota | |
| 040a | |
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 |
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