U.S. Highway 16 Corridor

Reduced Conflict Intersection (RCI) Information

How RCIs Work 

• Federal Highway Administration
• About RCIsSemi-Trucks and RCIsPickups with Loads and RCIs
  
  

RCI Testimonials (Videos)

• Business Owner 
• Business Owner
• City Official

2025 Construction

• Intersection of U.S. Highway 16 and Promise Road: grading, asphalt concrete resurfacing, curb and gutter, storm sewer, lighting, curb and sidewalk. 
  Construction 2025. View Project Details Here
  
  

2026 Construction

• East of Rockerville: Grading, modify intersections, install turn lanes, lighting. 
  Construction 2026 Future Road Design Sketch
  
  
• U.S. Highway 16 and U.S. Highway 16B Intersection: reconstruction with portland cement concrete surfacing and single point urban structure, median crossovers and traffic diversions. 
  Construction 2026 - 2028 View Project Details Here
  
  
• Neck Yoke Road Intersection: reconstruction to a reduced conflict intersection with asphalt concrete surfacing, construct median crossovers. Replace Spring Creek structures. 
  Construction 2026 - 2027 View Project Details Here
  

2027 Construction

• U.S. Highway 16 Intersection of Pink Cabin Road: install left turn lane.
  Construction 2027
  
  

2029 Construction

• Strato Rim Drive, Busted Five Lane, Wilderness Canyon Road, Bear Country Access, and American Buffalo Resort: reduced conflict intersections at with asphalt concrete surfacing.
  
  Construction 2029 -2030 FUTURE ROAD DESIGN SKETCH
  
  
• Median Crossovers
  Construction 2029
  
  

2030 Construction

• U.S. Highway 16 east and westbound: reconstruction with Portland cement concrete surfacing and replacement of Tower Road structure, pedestrian underpass.
  Construction 2030 - 2031
   Future Road Design Sketch
  
  
• U.S. Highway 16 east and westbound from south urban boundary Rapid City to north of U.S. Highway 16 Service Road: grading and portland cement concrete surfacing in urban section.
  Construction 2030
  
  
• U.S. Highway 16 east and westbound from east of Rockerville to south urban boundary Rapid City: mill and class s, pipe work.
  Construction 2030
  
  

2031 Construction

• U.S. Highway 16 east and westbound at Rockerville: grading and asphalt concrete surfacing.
  Construction 2031
  
  

2032 Construction

• U.S. Highway 16 east and westbound from Hill City to east of Rockerville: crack and seat, asphalt concrete resurfacing, pipe work.
  Construction 2032

Corridor Study Materials

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 was a collaborative effort among 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.

 View the U.S.16 Corridor Study Report

 U.S. 16 Rural SubArea Analysis

Contact Information