Interstate 190 (South Dakota)

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.

Interstate 190 marker

Interstate 190

Map
I-190 highlighted in red
Route information
Auxiliary route of I-90
Maintained by SDDOT
Length1.72 mi[1] (2.77 km)
Existed1958[2]–present
HistoryCompleted in 1962[citation needed]
NHSEntire route
Major junctions
South end I-90 BL / US 16 / SD 44 / SD 79 in Rapid City
North end I-90 / US 14 / US 16 / SD 79 in Rapid City
Location
CountryUnited States
StateSouth Dakota
CountiesPennington
Highway system
  • South Dakota State Trunk Highway System
SD 168 SD 203

Route description

Northern terminus at I-90

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]kmExitDestinationsNotes
0.000.00
To I-90 BL / West Boulevard south
Southern terminus of I-190; roadway continues as West Boulevard; stoplight intersection
0.430.69
US 16 west / SD 44 (Omaha Street) – Mount Rushmore
Southern end of US 16 concurrency
0.871.401CNorth Street – Civic Center
1.462.351A–1B I-90 (US 14 / SD 79) – Gillette, Sioux FallsNorthern 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

References

KML is from Wikidata