Drivers of vehicles proceeding in opposite directions shall pass each other to the right, and upon roadways having width for not more than one line of traffic in each direction, each driver shall give to the other at least one-half of the main-traveled portion of the roadway.
Passing Vehicles Proceeding In Opposite Directions
Mont. Code Ann. § 61-8-322, under Vehicle Operating Requirements.
Mont. Code Ann. § 61-8-322