April 2024
The Montana Department of Transportation (MDT) and partner Robert Peccia & Associates (RPA), Helena, have made progress on the Targhee Turn Lanes US Highway 20 (US 20) safety improvement project. The project is moving further into the design phase.
The design team has begun coordinating with environmental agencies and the Custer Gallatin National Forest based on the selected design alternative. An Alignment and Grade Report has been developed that defines the proposed improvements that will be shared at an open house planned for July. We will share more details as we get closer to the event.
MDT will continue to further develop the project with the RPA design team and stakeholders throughout 2024-2025. Construction is tentatively scheduled to begin in 2027. This schedule is subject to change due to funding availability, completion of the final design, economic conditions, and possible unforeseen factors.
If you have any questions or comments, please call the project hotline at 406-207-4484, operating during business hours, or email Sloane at
April 2023
After a brief pause to reallocate resources, the Targhee Turn Lanes US Highway 20 (US 20) project is moving forward. The Montana Department of Transportation (MDT) has hired consultant design engineering firm Robert Peccia & Associates (RPA), Helena, to conduct the design phase of the project.
The project is still in the early stages of this phase and is progressing toward developing a scope of work, which is an outline of the final design and construction activities required to complete the project. A timeline for the project has not yet been determined.
If you have any questions or comments, please call the project hotline at 406-207-4484, operating during business hours, or email Sloane at