Bus

A bus is a road vehicle designed to carry passengers. A bus can generally seat a maximum of anywhere from 8 to 250 passengers. Buses are the most widely used form of public transportation, although they are also used in tourism and as private transport.

The most common type of bus is the single-decker bus, with larger loads carried by double-decker buses and articulated buses, and smaller loads carried by midibuses and minibuses. A more luxurious version of the bus is the coach. Buses are usually powered by a diesel engine, although early buses were horse drawn and there were experiments with steam propulsion. Trolleybuses use power drawn from overhead power lines. In common with the car industry bus manufacturing is increasingly a globalised activity, with the same design of bus appearing on roads around the world.
Single deckers Bus

The most common design of bus is a rigid single-decker bus with two axles, or if needed, a second rear axle. The midibus is a lighter and smaller purpose built development of the single deck bus, which emerged in the 1990s. The minibus, originally developed from van conversions, fulfills the lowest capacity needs of buses. Minibuses today are both still derived from vans, or built specifically as minibuses.

Double deckers Bus

Where more capacity is needed, a double-decker bus or articulated bus may be used, the prevalence of which varies from country to country. A double-decker is a rigid vehicle with an extra upper deck, the two conjoined for access by a staircase usually in modern vehicles a spiral staircase near the front, but often at the rear on older vehicles, which may have an open platform. Larger double deckers might have both front and rear staircases.