A transport or conveyor system for moving materials in a carriage or vehicle having wheels, adapted to ride on parallel rails comprising a parallel rail system including automatic switching, turning and stopping means; a plurality of drive chains or belts disposed between the parallel rails, and a carriage or vehicle adapted to ride on the parallel rails and convey loads of materials, the carriage including a body, rail wheels attached to the body, a carrier wheel to engage the drive chain or belt attached to the body and means for transmitting the motion of the drive chain or belt to the carriage.