A double-decker bus is an iconic mode of transportation that is popular in many cities around the world. Synonyms for this type of bus include a double-deck bus, a double-decker coach, a double-decked bus, a high-decker bus, or simply a double bus. Many people associate these buses with London due to their prevalence on the city's streets, but they are also used in other cities such as New York, Chicago, and Hong Kong. Although the name may vary from city to city, the unique design of a bus with two levels of seating continues to be a popular choice for commuters and tourists alike.