Double-decker bus

A double-decker bus is a bus that has two storeys or decks. Double-decker buses are used for mass transport in the United Kingdom, Europe, Asia and many former European possessions, the most iconic example being the red London bus.

Early double-deckers put the driver in a separate cab. Passenger access was via an open platform at the rear, and a bus conductor would collect fares. Modern double-deckers have a main entrance door at the front, and the driver takes fares, thus halving the number of bus workers aboard, but slowing the boarding process. The rear open platform, popular with passengers, was abandoned for safety reasons, as there was a risk of passengers falling when running and jumping onto the bus.

Double-deckers are primarily for commuter transport but open-top models are used as sight-seeing buses for tourists. William Gladstone, speaking of London's double-deck horse drawn omnibuses, once observed, "...the best way to see London is from the top of a bus".

Cities listed here have double-decker buses as part of their regular mass transit fleet. Cities with only tourist and sightseeing double-decker buses are excluded.

Double-decker buses are in common use throughout the United Kingdom, and have been favoured over articulated buses by many operators because of the shorter length of double-deckers and larger amount of seating capacity; they also may be safer to operate through the narrow streets and tight corners common in Britain. The majority of double-decker buses in the UK are between 9.5 metres (31 ft 2 in) and 11.1 metres (36 ft 5 in) long, the latter being more common since the mid-1990s, though there are three-axle 12-metre (39-foot-4-inch) models in service with some operators. Double-decker coaches in the UK have traditionally been 12.0 metres (39 feet 4 inches) in length, though many newer models are about 13.75 metres (45 ft 1 in). The maximum permissible length of a rigid double-decker bus and coach in the UK is 15.0 metres (49 ft 3 in), and although there are no theoretical restrictions on height, coaches are normally built to 4.38 metres (14 ft 4 in) high, while 'highbridge' buses are normally about 20 centimetres (8 in) taller. Articulated double-deckers are also allowed at a maximum length of 18.75 metres (61 ft 6 in).

...
Wikipedia