Former school bus driver Biff Smith manages a trucking company which has its fleet pitted against a freight train in a race to deliver aviation parts to the Pacific coast.Former school bus driver Biff Smith manages a trucking company which has its fleet pitted against a freight train in a race to deliver aviation parts to the Pacific coast.Former school bus driver Biff Smith manages a trucking company which has its fleet pitted against a freight train in a race to deliver aviation parts to the Pacific coast.