South Dakota Highway 391

South Dakota Highway 391 (SD 391) is a 3.362-mile-long (5.411 km) state highway in the southwestern part of the U.S. state of South Dakota. It travels from Nebraska Highway 27 (N-27) at the Nebraska state line, southeast of Denby, to U.S. Route 18 (US 18) east-southeast of Denby. The highway is located entirely within Oglala Lakota County and in the Pine Ridge Indian Reservation. It is maintained by the South Dakota Department of Transportation (SDDOT), and is not part of the National Highway System.

Highway 391
Route information
Defined by SDCL §31-4-236
Maintained by SDDOT
Length3.362 mi[1] (5.411 km)
Major junctions
South end N-27 at the Nebraska state line southeast of Denby
North end US 18 near Denby
Location
CountiesOglala Lakota
Highway system
  • South Dakota Highways
← SD 377→ SD 407

Route description

SD 391 begins at the Nebraska state line as a continuation of N-27 and travels northeast through rolling plains on the Pine Ridge Indian Reservation in Oglala Lakota County. The highway curves to the northwest, then bends to the north near its northern terminus. Shortly after this, the route ends at an intersection with US 18.[2]

SD 391 is maintained by SDDOT. In 2012, the traffic on the highway was measured in average annual daily traffic, and SD 391 had an average of 920 vehicles.[1] The designation is not a part of the National Highway System,[3] a system of highways important to the nation's defense, economy, and mobility.[4]

Major intersections

The entire route is in Oglala Lakota County.

Locationmi[1]kmDestinationsNotes
​0.0000.000 N-27 southContinuation into Nebraska
​3.3625.411 US 18 / Gordon Junction Road north – Pine Ridge, MartinNorthern terminus of SD 391; southern terminus of CR 11
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
  1. "State Highway Log" (PDF). South Dakota Department of Transportation. January 2012. Retrieved March 3, 2013.
  2. Google (March 3, 2013). "South Dakota Highway 391" (Map). Google Maps. Google. Retrieved March 3, 2013.
  3. National Highway System: South Dakota (PDF) (Map). Federal Highway Administration. October 1, 2012. Retrieved March 3, 2013.
  4. Natzke, Stefan; Neathery, Mike; Adderly, Kevin (September 26, 2012). "What is the National Highway System?". National Highway System. Federal Highway Administration. Retrieved March 3, 2013.

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