The Idaho Transportation Department will begin construction next week to improve safety and capacity on State Highway 75 between Elkhorn Road and River Street. Construction is expected to be completed in late 2026.
Crews will remove trees in select locations the week of April 28. Generally throughout construction, motorists can expect:
- The speed limit on SH-75 will be reduced to 25 mph in the construction zone.
- Work will occur Monday – Saturday between 7:30 a.m. – 7 p.m. with the occasional exception on nights and weekends.
- One lane will remain open in each direction on SH-75 between Elkhorn Road and River Street.
- Closures will occur on local roads, and detours will be in place.
- Traffic shifts will occur on SH-75 and local roads.
SH-75 is the primary north-south highway in the Wood River Valley serving the cities of Bellevue, Hailey, Ketchum and Sun Valley in Blaine County. Improvements include widening SH-75 to 4 lanes between Elkhorn Road and River Street, improving intersections and local roads and making pedestrian access more readily available in the project area. These changes have been developed to accommodate traffic projections for the next 20 years.
The project team will share information about upcoming traffic impacts through email and website updates. For more details and to sign up for construction updates, please visit the project website at itdprojects.idaho.gov/pages/idaho75, email info@sh75project.com or call (208) 254-0421.