Double-decker bus

A double-decker bus is a bus that has two levels. While double-decker long-distance coaches are in widespread use around the world, double-decker city buses are less common. Double-decker buses are popular in some European cities and in some parts of Asia, usually in former British colonies. Many towns around the world have a few that specialise in short sight-seeing tours for tourists for, as William Gladstone observed, "the way to see London is from the top of a 'bus'" (Gladstone was referring to London's once ubiquitous double-deck horse drawn omnibuses, rather than a motor bus).