(CNN) -- 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.
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.
May 3, 1983 - The AIRPORTER bus service begins shuttles from the Embarcadero station to San Francisco International Airport.
March 21, 1994 - BART's new operation center opens underneath the Lake Merritt Administration Building.
November 1999 - San Francisco Municipal Transportation Agency (SFMTA) is created when MUNI and the Department of Traffic are combined.
June 22, 2003 - BART officially opens a line to San Francisco International Airport.
June 25, 2006 - BART ridership surpasses 100 million - 100,128,800 for the 2006 fiscal year ending June 30.
January 1, 2009 - BART police officer Johannes Mehserle shoots and kills unarmed Oscar Grant III on a BART platform at the Fruitvale Station in Oakland. Officer Mehserle later resigns, is arrested, tried and convicted of involuntary manslaughter.
July 3, 2011 - BART and Oakland police shoot and kill knife-wielding Charles Blair Hill at the civic Center Station in Oakland.
August 11, 2011 - BART cuts off wireless network service for three hours at several San Francisco stations to prevent coordinated protests of the shooting of Hill.
August 15, 2011 - "Flash mobs" close several BART stations for more than two hours in protest to BART shutting off wireless service.
August 18, 2011 - BART Police Officers Association website is hacked for the second time by the group Anonymous in retaliation for the wireless service shutdown of August 11. The group publishes the personal and home information of the police officers publicly on the Internet.
August 22, 2011 - BART stations are closed as protestors demonstrate against the wireless service shutoff. The closures are said to be an attempt to prevent the demonstrations from reaching the station platform.
September 9, 2011 - Arrests are made and the Powell Street BART Station is closed as protesters attempt to demonstrate.
2012 - BART orders 775 new cars to be built by Bombardier Transit Corporation. The first cars should arrive in 2017.
July 1, 2013 - BART unions go on strike. The dispute centers on pay and benefits.
July 5, 2013 - Although contract negotiations are not finished, BART union workers end their strike and return to work.
October 18, 2013 - Union workers at BART go on strike.
October 19, 2013 - Two BART workers are killed by a train driven by an "operator trainee" during a strike.
October 21, 2013 - Union leaders and the management of BART come to an agreement to end a four day strike.
April 17, 2014 - OSHA State regulators fine BART $210,000 for the safety violations that lead to the death of two BART workers in October of 2013.
July 1, 2014 - The father of Oscar Grant III loses a civil suit against Johannes Mehserle, the former BART police officer who was convicted of involuntary manslaughter in the death of his son in January of 2009.