Double-decker bus
With the exception of coaches, double-decker buses are uncommon in the United States. Many private operators, such as Megabus, run by Coach USA, employs double-decker buses on its busier intercity routes.
Double-decker tram
A double-decker tram is a tram that has two levels. Some double-decker trams have open tops. Double-deck trams were once popular in some European cities, like Berlin and London, throughout the British Empire countries in the early half of the 20th century including Auckland, Christchurch and Wellington in New Zealand; Hobart, Tasmania in Australia and in parts of Asia. They are still in service in Hong Kong, Alexandria, Dubai, Oranjestad and Blackpool.