I-90 South Dakota Segment

Interstate 90 (I-90) is a vital east-west transportation corridor that runs across the state of South Dakota. In South Dakota, I-90 spans approximately 392 miles, beginning at the western state border near Spearfish and extending to the eastern state border at the junction with I-29 near Sioux Falls. As part of the national interstate system, I-90 serves as a key route for both regional and long-distance travel, facilitating connections between major cities and rural areas.

The corridor primarily supports freight movement and commuter travel, operating as an essential artery for economic activities in the region. With Sioux Falls being the largest city in South Dakota, it is crucial for the corridor to support a growing population currently estimated at around 200,000 residents. The corridor enhances accessibility to various industries and businesses located in and around Sioux Falls, which is a central hub for commerce in the state.

Notable destinations along I-90 include the Badlands National Park and Mount Rushmore National Memorial, both of which attract significant tourism and contribute to the state’s economy. The highway also provides access to several small towns and communities, promoting regional connectivity.

Recent infrastructure upgrades along the I-90 corridor have focused on enhancing safety and addressing congestion patterns, particularly during peak travel seasons. Transportation planning initiatives continue to prioritize improvements that accommodate increased traffic volumes, ensuring that the corridor remains a critical asset for South Dakota's economy and transportation network.