|
Bay Area Rapid Transit (BART) is a rapid transit system serving the San Francisco Bay Area. The heavy-rail public transit and subway system connects San Francisco with cities in the East Bay and suburbs in northern San Mateo County. BART's rapid transit system operates five routes on of line, with 44 stations in four counties. With an average of 422,490 weekday passengers, 211,288 Saturday passengers, and 158,855 Sunday passengers in September 2014, BART is the fifth-busiest heavy rail rapid transit system in the United States. BART is operated by the San Francisco Bay Area Rapid Transit District, a special-purpose transit district that was formed in 1957 to cover San Francisco, Alameda County, and Contra Costa County. The acronym is almost universally pronounced like the name "Bart" rather than spelled out. BART combines the aesthetics and carrying capacity of a metro system with the logistics and pricing model of commuter rail. It is an alternative to highway transportation, especially to avoid congestion on the San Francisco Bay Bridge, which connects San Francisco to the East Bay suburbs and the city of Oakland. , the BART system is being expanded to San Jose with the consecutive Warm Springs and Silicon Valley BART extensions. ==System== BART revenue routes cover with 44 stations. Trains run on exclusive right-of-way, in subways or elevated. The system uses a Indian gauge〔 and mostly ballastless track instead of the standard gauge and railroad ties used on United States railroads. As a result, all maintenance and support equipment must be custom built. The maximum speed trains can travel is ,〔 but BART does not typically operate trains at that speed except to help a train make up time. The maximum speed BART uses during normal operations is 70 mph. Trains length ranges from four cars to a maximum of ten cars, which fills the length of a platform. At its maximum length of , BART has the longest trains of any metro system in the United States. The system also features car widths of (the same width as a Budd Metroliner), a maximum gradient of four percent, and a minimum curve radius of on the main lines . DC electric current at 1,000 volts is delivered to the trains over a third rail.〔 In stations the third rail is on the side away from the passenger platform, except the middle platform at the San Francisco International Airport station. This reduces the danger of a passenger falling on the third rail or stepping on it to climb back to the platform after falling off. On ground-level tracks, the third rail alternates from one side of the track to the other, providing breaks in the third rail to allow for emergency evacuations. Underground tunnels, aerial structures and the Transbay Tube have evacuation walkways and passageways to allow for train evacuation without exposing passengers to contact with the third rail, which is located as far away from these walkways as possible. Many of the original system 1970s-era BART stations, especially the aerial stations, feature simple, Brutalist architecture, while the newer stations are a mix of Neomodern and Postmodern architecture. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bay Area Rapid Transit」の詳細全文を読む スポンサード リンク
|