Interstate 190 (South Dakota)


Interstate 190 is an auxiliary Interstate Highway in the U.S. state of South Dakota. The route runs for about 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 and its only auxiliary route west of the Mississippi River.

Route description

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.

State law

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

History

I-190 was opened in 1962 to connect Rapid City to the recently completed I-90 bypass, which was built outside of Rapid City's northern boundaries.
The interchange with I-90 was rebuilt in the late 1990s, changing from a directional-T interchange with a left exit to a trumpet interchange. The Omaha Street intersection was rebuilt in 2004, while the Silver Street interchange was converted to a single-point urban interchange in 2017.

Exit list

All exit numbers start with 1.