Location:

US-12 between Junction Montana 88-Garrison and 5.50 miles W of Junction Interstate 15 and US 287 South-Helena

Construction:

The following construction project is in effect: overlaying between 6.25 miles east of MacDonald Pass and 6.50 miles west of Junction Interstate 15 and US 287 South-Helena including reduced speed limited to 35 MPH (travelers can expect single lane closures and single lane traffic).