Interstate 190 South Dakota
Interstate 190 is a short spur from Interstate 90 south into Downtown Rapid City. It runs concurrent with U.S. 16 as part of a route to Black Hills National Forest and Mount Rushmore National Monument.
A single point urban interchange (SPUI) was constructed along Interstate 190 at Silver and North Streets from September 2015 to October 2017. Construction included the replacement of the I-190 overpasses above North Street and the removal of the frontage roads south of there. Work also added a bike path along the west side of I-190 to the north.
Interstate 190 opened in 1962.2 The bridges over North Street were built in 1958.1 The exchange joining the north end of I-190 with I-90 was reconfigured from a directional T interchange with left ramps into a trumpet interchange in 2000.
The Omaha Street Project, underway during the 2003 and 2004 construction seasons, rebuilt the intersection where I-190 & U.S. 16 ties into Omaha Street (SD 44) and West Boulevard. The public private partnership expanded Omaha Street into a six lane arterial from 12th Street to East Boulevard, with work completed just ahead of schedule on July 3, 2004.3
Construction on the I-190/Silver Street Interchange Project commenced in August 2015 with land clearing. Closure of the southbound lanes of I-190 followed by March 2016 so crews could rebuild them and replace the span above North Street. Phase III reopened the southbound lanes for two-way traffic in October 2016 as the northbound lanes were rebuilt. Phase IV involved paving of Nickel Street (formerly West Boulevard).1
NB I190 on ramp @ Anamosa St. will be closed permanently & traffic will be switched head to head in the NB Lanes beginning Monday March 7.
— SDi190info (@SDi190info) March 3, 2016
A ribbon cutting ceremony took place on August 15, 2017 and the exchange officially opened to traffic on August 18.4 Total costs were estimated at $32.5 million for SDDOT and $1.7 million for the city of Rapid City. Final projects items for the I-190/Silver Street Interchange Project wrapped up in October 2017.1,4
North End – Rapid City, SD
South End – Rapid City, SD
Mileage – 1.72
Cities – Rapid City
- Junctions –
Source: December 31, 2018 Interstate Route Log and Finders List
I-190 Annual Average Daily Traffic (AADT)
|Location||Vehicles per day|
|SD 44 to North St||18,670|
|North St to I-90||19,020|
Source: 2019 South Dakota Traffic Flow Map, South Dakota Department of Transportation (SDDOT).
North End – Rapid City, South Dakota
North East at
I-90/U.S. 14 east / SD 79 south traverse the hills separating industrial west Rapid City from the residential street grid on the one mile approach to I-190 south / U.S. 16 west. Mount Rushmore is the I-190 control point, as the freeway represents the initial leg of the route along U.S. 16 southwest to Rockerville and the national monument. 08/20/14
I-90 travels between retail areas on the 1.75 mile approach to Interstate 190 and U.S. 16. Traffic counts recorded by SDDOT in 2019 increased from 33,340 vehicles per day here to 37,180 vpd ahead of I-190. This sign was replaced in 2019 with Civic Center added and B.H. National Forest dropped. Photo by Joseph Barnes (12/13/17).
North End Throwback
South End – Rapid City, South Dakota
South West at
East West at
South End Throwback
South West at
A new sign bridge replaced this assembly at the south end of I-190 when SD 79 was realigned in 2005. The state highway formerly followed a route across the city via Sturgis Road, and Chicago, Omaha and St. Joseph Streets. Photo by Jay Maynard (07/06/02).
East South at
A second set of signs were posted on the northeast corner of Omaha Street at I-190 and West Boulevard. These were replaced during the Omaha Street Project to no longer reference U.S. 16 east. The assembly with SD 79 was replaced by 2003 with a new sign bridge for the adjacent split of U.S. 16 west from SD 44 east. Photo by Jay Maynard (07/06/02).
- I-190/Silver Street Interchange Project. June 2016 Newsletter.
- The South Dakota Highways Page: Highways 101 to 200.
- “Omaha Street to Open Ahead of Schedule.” South Dakota DOT, press release. July 1, 2004.
- I-190/Silver Street Interchange Project Newsletter. September 2017.
Page updated May 8, 2020.