San Francisco has a well-developed transportation system that offers commuters and visitors a variety of options. The San Francisco Municipal Transportation Agency (SFMTA) operates the city's public transportation network, which includes buses, light rail, and cable cars. In addition, the Bay Area Rapid Transit (BART) system provides regional train service to and from San Francisco. Cabs, ride-sharing services, and bicycle rentals are also popular transportation options. Due to the city's compact size and dense population, many people choose to explore San Francisco on foot or by bicycle.