Workers in this unit group drive street railway cars and motor vehicles for the transport of passengers and freight by road. Their functions include: driving street railway cars; driving motor cars or three-wheeled motorised vehicles to transport passengers on demand; driving motor buses or motor coaches to transport local or long-distance passengers; driving heavy motor trucks, light lorries or vans to transport freight locally or over long distances; driving motor-cycles or motorised carrier tricycles equipped to transport goods; driving other motor vehicles such as hire cars, ambulances or new motor vehicles from assembly plant to delivery or shipping points.