Interstate 190 (South Dakota)

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Interstate 190 marker

Interstate 190
Route information
Defined by SDCL §31-4-203
Maintained by SDDOT
Length: 1.72 mi[1] (2.77 km)
Major junctions
South end: I‑90 Bus. / US 16 / SD 44 / SD 79 in Rapid City
North end: I‑90 / US 14 / US 16 in Rapid City
Highway system

South Dakota Highways

SD 168 SD 203

Interstate 190 (I-190) is an auxiliary Interstate Highway in the U.S. state of South Dakota. The route runs for about 2 miles (3.2 km) south, connecting I-90 to downtown Rapid City. Its length from I-90 to Omaha Street runs concurrent with US 16. It is the westernmost auxiliary route of I-90 (approximately 1,190 miles (1,920 km) east of the highway's western terminus in Seattle, Washington) and its only auxiliary route west of the Mississippi River.

Route description[edit]

I-190 begins as West Boulevard and has an intersection with Omaha Street, which is signed as US 16/SD 44. US 16 westbound goes east on Omaha Street and eastbound runs north concurrently with I-190. I-190 then becomes a freeway, with an exit to North Street. I-190 then passes under Anamosa Street before an on-ramp from the northbound lanes of West Boulevard. Both US 16 and I-190 then terminate at a trumpet interchange with I-90/US 14/SD 79.[2]

State law[edit]

Legally, the route of I-190 is defined at South Dakota Codified Laws § 31-4-203.[3]


Exit list[edit]

All exit numbers begin with 1. Only lettered exits are given. The entire route is in Rapid City, Pennington County.

mi[4] km Exit Destinations Notes
0.00 0.00 To I‑90 Bus. / West Boulevard
0.43 0.69 US 16 west / SD 44 / Omaha Street – Mount Rushmore
0.87 1.40 C North Street – Rushmore Plaza Civic Center
1.46 2.35 A–B I‑90 / US 14 / SD 79 – Gillette, Sioux Falls Northbound exit and southbound entrance; eastern terminus of US 16, northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ "Route Log and Finder List - Interstate System: Table 2". FHWA. Retrieved 2007-10-03. 
  2. ^ Google (2011-09-07). "I-190" (Map). Google Maps. Google. Retrieved 2011-09-07. 
  3. ^ "South Dakota Codified Laws - § 31-4-203". South Dakota Legislature. Retrieved 2008-06-25. 
  4. ^ "Transportation Inventory Management". South Dakota Department of Transportation. Retrieved 2008-06-25. 

Route map: Bing