The driver of a motor vehicle traveling through defiles or canyons or on mountain highways shall hold the motor vehicle under control and as near the right-hand edge of the roadway as reasonably possible.
Mont. Code Ann. § 61-8-361
Driving on mountain highways
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.