This map shows the project limits starting at the Yellowstone Avenue and US 191 intersection, extending north on US 191 for approximately 9.6 miles, ending just north of the US 191 intersection with US 287. Landmarks illustrated on the map include Hebgen Lake, Yellowstone Airport, West Yellowstone, and a label showing that Big Sky is north of the project.
  • May 18 2026

WEST YELLOWSTONE, Mont. – The Montana Department of Transportation (MDT) and partner Jeffrey Contracting, LLC are improving several miles of U.S. Highway 191 (US 191), near West Yellowstone. The project will begin at the intersection of Yellowstone Avenue and US 191, extending north for approximately 9.6 miles, toward Big Sky. The purpose of the West Yellowstone North project is to improve the roadway surface and enhance safety features. Construction is expected to start in late spring/early summer and be completed in approximately one month, weather and other unforeseen factors permitting.

Planned project improvements include:

  • Application of seal and cover (chip seal)
  • Addition of new roadway signage with flashers
  • Updated roadway striping

Chip seal is a cost-effective method used to protect and extend the life of the roadway surface. It involves applying a thin layer of asphalt to the road surface, followed by a layer of gravel or crushed stone. The gravel is then pressed into the asphalt to help seal cracks, prevent water from seeping into the roadway, and improve the driving surface.

During construction, drivers can expect temporary parking restrictions and lane closures, as well as flaggers directing traffic. The project team will reach out to area businesses in advance to inform them about upcoming parking restrictions. 

For more information, including traffic control updates, or to submit questions and comments regarding this project, please contact Megan at 406-869-6333 or via email at mmclean@dowl.com.


Tags: News Releases and Construction