Project Overview
Updated September 24, 2026
U.S. Highway 20 (US 20), otherwise known as Targhee Pass Highway, is well-known for its recreational access. Drivers can take the highway to Yellowstone National Park or stop along the way at numerous lodging sites – from campgrounds and cabins to hotels and lodges.
This corridor has an intersection-related crash pattern near Denny Creek Road. The Montana Department of Transportation (MDT) is working to enhance safety on this section of the roadway through the Targhee Turn Lanes project, which will improve 1 mile of US 20 by installing a center-turn lane between the Mountainside KOA and Denny Creek Road and a left-turn lane at Denny Creek Road, west of West Yellowstone, near the Montana-Idaho border. Construction is tentatively scheduled for 2027.
Project Funding:
The Targhee Turn Lanes project will be primarily funded through the Highway Safety Improvement Program. The primary focus of the program involves identifying locations where higher severity crashes have occurred and prioritizing work that reduces these crashes.
The public is encouraged to reach out with thoughts and questions by calling the project hotline at 406-207-4484, operating Monday through Friday from 9 a.m. to 5 p.m., or by emailing