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An urban railway system in metropolitan areas, operating on exclusive underground rights of way. Characterized by high passenger capacity and frequency of service. Examples include the London Underground and the New York City Subway.

An electric bus that draws power from overhead wires using spring-loaded trolley poles. Combines the flexibility of buses with the reliance on electricity rather than fossil fuels. Examples include the trolleybus systems of San Francisco and Seattle.

A rail-based form of public urban transportation that generally operates on public streets, with lighter passenger capacities than heavy rail. Examples include the San Francisco cable cars and the Melbourne tram network.

A high-quality bus-based public transport system that delivers fast, comfortable, and cost-effective urban mobility through segregated bus lanes, station design, and enhanced information systems. Examples include TransMilenio in Bogotá, Colombia and Metrobüs in Istanbul, Turkey.

A boat or ship used for carrying passengers, and sometimes their vehicles, across a body of water. Offers alternative routes in coastal cities or across rivers where bridges are not available or practical. Examples include the Staten Island Ferry in New York City and the Star Ferry in Hong Kong.

A type of cable railway system that uses cables or ropes to haul the cars up steep inclines or across chasms. Usually found in mountainous areas or as a tourist attraction in urban settings. Examples include the Table Mountain Aerial Cableway in Cape Town and the Emirates Air Line in London.

A service in which bicycles are made available for shared use to individuals on a short-term basis. It allows people to borrow a bike from point A and return it at point B. Prominent examples include Vélib' in Paris and Citi Bike in New York City.

A type of small-scale automated guideway transit system that serves a specific area such as an airport or a downtown district. Known for driverless operation and frequent service. Examples include the SkyTrain at JFK International Airport and the Detroit People Mover.

A type of passenger train designed to transport passengers to and from the suburbs to the central city. Typically operates on a schedule and is characterized by its long travel distances and limited number of stops. Examples include the S-Bahn in Germany and the Long Island Rail Road in New York.