US Highway 16CORRIDOR STUDY

Planning for the future of South Dakota’s driveway to Mt. Rushmore

The South Dakota Department of Transportation (SDDOT) initiated a study of over 16 miles of U.S. Highway 16 between Cathedral Drive/Fairmont Boulevard in Rapid City and the Keystone Wye to address growing traffic volumes and other challenges throughout the area. The corridor is constantly evolving, whether day to day or year to year. Continued development in the area led to notable increases in traffic that are consistent throughout the year. During the summer the corridor sees a spike in tourism-related traffic that brings motorists unfamiliar with the area and a diverse mix of vehicle types.

This study is a collaborative effort between the SDDOT, FHWA, Rapid City MPO, Rapid City, Pennington County, stakeholders, and the public to develop a comprehensive plan for the corridor. This study will serve as a guide to the SDDOT and other agencies along the corridor for future improvements to address needs well into the future.

STUDY AREA MAP

Study Highlights

• Overall U.S. 16 Corridor StudyFinal Reports
• Sub-Area Analysis (East of Rockerville to West of Neck Yoke Road)Sub-Area Analysis
• U.S. 16/U.S. 16B/Catron Boulevard Single Point Interchange (SPI) Study Recommendation
• U.S. 16/Neck Yoke Road Reduced Conflict Intersection (RCI) Study Recommendation
• Nov. 22, 2022 Public Meeting InfoPublic Meeting
• Environmental – coming soon