Here's a look at what you should know about the San Francisco Bay Area's rapid transit system which is referred to as BART (Bay Area Rapid Transit).
Facts: San Francisco Municipal Transportation Agency (SFMTA), which operates BART and MUNI, manages all forms of San Francisco area transportation and traffic, including bicycles, pedestrians, taxis and parking.
The BART system services San Francisco Bay area, Oakland, San Mateo County and Santa Clara County.
There are 44 BART stations: 16 surface, 13 elevated, and 15 subway stations.
There are 669 revenue vehicles.
There are 104 miles of BART track.
The trains travel at 80 mph maximum, 33 mph average, and make 20-second station stops.
About 400,000 people use BART to commute each day. (2013)
BART has its own police force, with 206 legally sworn-in law enforcement officers and 96 other staff members.
$1.619 billion: the cost of the original BART system.
BART owns and operates a wireless network that supplies cell phone service to riders underground.
BART does not run 24-hours per day.
MUNI covers 47 square miles of the Bay area with, seven light rail lines, historic streetcars, three cable car lines and 63 bus routes.
There are 495 diesel buses, 344 electric trolley buses, 26 historic electric trolleys buses, 151 metro streetcars, 40 cable cars and 86 hybrid buses.
Timeline: 1912 - San Francisco Municipal Railway system MUNI is established, it is one of the oldest transit systems in the world. This is the local public transportation system before BART.
May 24, 1962 - Three northern California counties, Alameda, Contra Costa and San Francisco adopt a plan to build a rapid transit system together. Originally Marin and San Mateo counties were to be part of the plan but they opted out.
June 19, 1964 - Groundbreaking ceremony, with President Lyndon B. Johnson presiding, on the 4.4 mile test track between Concord and Walnut Creek.
November 1966-August 1969 - Construction of the Transbay Tube on the bottom of San Francisco Bay. The final cost of the tube is $180 million.
September 11, 1972 - The system opens to the public from Oakland to Fremont.
September 16, 1974 - Transbay Tube opens to the public.
January 29, 1973 - The second leg of the system opens and extends from Oakland to Richmond.
May 21, 1973 - The Concord line opens.
November 3, 1973 - The San Francisco line opens.
1974 - Express bus service opens from Daly City to Belmont.
March 10, 1975 - BART and MUNI begin a transfer system, cutting fares in half for BART/MUNI combinations riders.