Revise right-of-way laws for roundabouts

This bill updates Montana's right-of-way rules for roundabouts and rotary traffic islands to clarify how vehicles should navigate these intersections. It directly affects drivers, towing vehicles, and local transportation authorities by establishing specific procedures for entering and circulating around roundabouts. The law requires vehicles already in a roundabout to have the right-of-way over approaching traffic, mandates that drivers stay to the right of the center, and includes special rules for towing vehicles, such as allowing them to cross lanes when signaling and giving priority to towing vehicles on the left when two enter simultaneously. Additionally, the bill formally defines a roundabout as a circular intersection where all entering traffic must yield to vehicles already inside.