Interstate 190 (I-190) is an auxiliary Interstate Highway in the US state of South Dakota. The route runs for about two miles (3.2 km) connecting I-90 to downtown Rapid City. The entire route is concurrent with US Highway 16 (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.
I-190 highlighted in red | ||||
Route information | ||||
Auxiliary route of I-90 | ||||
Maintained by SDDOT | ||||
Length | 1.72 mi[1] (2.77 km) | |||
Existed | 1958[2]–present | |||
History | Completed in 1962[citation needed] | |||
NHS | Entire route | |||
Major junctions | ||||
South end | ![]() ![]() ![]() ![]() | |||
North end | ![]() ![]() ![]() ![]() | |||
Location | ||||
Country | United States | |||
State | South Dakota | |||
Counties | Pennington | |||
Highway system | ||||
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Route description
![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/50/Northern_End_Of_Interstate_190.jpg/220px-Northern_End_Of_Interstate_190.jpg)
I-190 begins as West Boulevard and has an intersection with Omaha Street, which is signed as US 16/South Dakota Highway 44 (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 onramp 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.[3]
State law
Legally, the route of I-190 is defined at South Dakota Codified Laws § 31-4-203.[4]
History
A freeway replacing West Bypass to connect downtown Rapid City to I-90 was proposed by the city government.[5] The designation of I-190 for this connector was approved by the American Association of State Highway Officials in November 1958.[2]
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.[6]
The interchange with I-90 was rebuilt from 2000 to 2001, changing from a directional T interchange with a left exit to a trumpet interchange.[7][8][9] The Omaha Street intersection was rebuilt in 2004,[10] while the North Street interchange was converted to a single-point urban interchange in 2017.[11]
Exit list
The entire route is in Rapid City, Pennington County.
mi[12] | km | Exit | Destinations | Notes | ||
---|---|---|---|---|---|---|
0.00 | 0.00 | ![]() ![]() | Southern terminus of I-190; roadway continues as West Boulevard; stoplight intersection | |||
0.43 | 0.69 | ![]() ![]() ![]() | Southern end of US 16 concurrency | |||
0.87 | 1.40 | 1C | North Street – Civic Center | |||
1.46 | 2.35 | 1A–1B | ![]() | Northern terminus of I-190; eastern terminus of US 16; northern end of US 16 concurrency; northbound exit and southbound entrance; left exit A to 90 westbound; trumpet interchange; I-90 exit 57 | ||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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