Interstate 190 is an auxiliary Interstate Highway in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of South Dakota

South Dakota

South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. Once a part of Dakota Territory, South Dakota became a state on November 2, 1889. The state has an area of and an estimated population of just over...

. The route runs for about two miles (3 km) south, connecting I-90

Interstate 90

Interstate 90 is the longest Interstate Highway in the United States at . It is the northernmost coast-to-coast interstate, and parallels US 20 for the most part. Its western terminus is in Seattle, at Edgar Martinez Drive S. near Safeco Field and CenturyLink Field, and its eastern terminus is in...

 to downtown Rapid City

Rapid City, South Dakota

Rapid City is the second-largest city in the U.S. state of South Dakota, and the county seat of Pennington County. Named after Rapid Creek on which the city is established, it is set against the eastern slope of the Black Hills mountain range. The population was 67,956 as of the 2010 Census. Rapid...

. The entire length overlaps U.S. Route 16

U.S. Route 16

U.S. Route 16 is an east–west United States Highway between Rapid City, South Dakota and Yellowstone National Park in Wyoming....

. It is the westernmost auxiliary route of Interstate 90, approximately 1150 miles (1850 km) east of the highway's western terminus in Seattle, Washington

Seattle, Washington

Seattle is the county seat of King County, Washington. With 608,660 residents as of the 2010 Census, Seattle is the largest city in the Northwestern United States. The Seattle metropolitan area of about 3.4 million inhabitants is the 15th largest metropolitan area in the country...

. It is also the highway's only auxiliary route west of the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

.

Route description

I-190 begins as West Boulevard and has an intersection with Omaha Street, which is signed as US 16 and SD 44. US 16 continues eastbound on Omaha Street and runs concurrently with I-190 for the Interstate's entire length. I-190 then becomes a freeway, with an exit to North Street. I-190 then passes under Anamosa Street before an onramp to the northbound lanes from West Boulevard. I-190 then terminates at a trumpet interchange with I-90 and US 14.

Exit list

The entire route is in Rapid City

Rapid City, South Dakota

Rapid City is the second-largest city in the U.S. state of South Dakota, and the county seat of Pennington County. Named after Rapid Creek on which the city is established, it is set against the eastern slope of the Black Hills mountain range. The population was 67,956 as of the 2010 Census. Rapid...

, Pennington County

Pennington County, South Dakota

As of the census of 2000, there were 88,565 people, 34,641 households, and 23,278 families residing in the county. The population density was 32 people per square mile . There were 37,249 housing units at an average density of 13 per square mile...

. Exit lettering increases southward.

Mile	# Exit number An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....	Destinations	Notes
0.00
0.43
0.87	1A	North Street – Civic Center
1.46	0	– Gillette Gillette, Wyoming Gillette is a city in and the county seat of Campbell County, Wyoming, United States. The population was 29,087 in 2010. Gillette is a city centrally located in an area involved with the development of vast quantities of American coal, oil, and coal bed methane gas... , Sioux Falls Sioux Falls, South Dakota Sioux Falls is the largest city in the U.S. state of South Dakota. Sioux Falls is the county seat of Minnehaha County, and also extends into Lincoln County to the south...	Northbound exit and southbound entrance; signed as exits 0A (west) and 0B (east)