Buses

A bus (also called omnibus or autobus) is a road vehicle designed to carry passengers. The most common type of bus is the single-decker bus, with larger loads carried by the double-decker bus and the articulated bus, and smaller loads carried by minibus. Most modern buses are powered by a combustion engine, although early buses were horse drawn, some used steam propulsion and trolleybuses used power from overhead electric power lines. More recently there is interest in hybrid electric bus, fuel cell bus, electric bus as well as ones powered by compressed natural gas or bio-diesel.