Convoy

Convoy is a movie starring Kris Kristofferson, Ali MacGraw, and Ernest Borgnine. Truckers form a mile long "convoy" in support of a trucker's vendetta with an abusive sheriff...Based on the country song of same title by C.W. McCall.
Trucker Rubber Duck and his buddies Pig Pen, Widow Woman and Spider Mike use their CB radios to warn one another of the presence of cops. But conniving Sheriff Wallace is hip to the truckers' tactics, and begins tricking the drivers through his own CB broadcasts. Facing constant harassment from the law, Rubber Duck and his pals use their radios to coordinate a vast convoy and rule the road.