Muni is most useful for riders who need to move aound the city and need access to areas where BART stations are non-existant.
The San Francisco Municipal Railway (SF Muni or Muni) is the public transit system for the city and county of San Francisco, California. In 2006, it served 46.7 square miles (121 km2) with an operating budget of about $700 million. In terms of ridership, Muni is the seventh largest transit system in the United States, with 210,848,310 rides in 2006 and the second largest in California behind Metro in Los Angeles. With a fleet average of 7-8.1 mph, it is also the slowest major transit system in America.
Muni is an integral part of public transit in the city of San Francisco, operating 365 days a year and connecting with regional transportation services, such as Bay Area Rapid Transit (BART), SamTrans, and AC Transit. Its network consists of 54 bus lines, 17 trolley bus lines, 7 light rail lines that operate above ground and in the City's lone subway tube (called Muni Metro), 3 cable car lines, and a heritage streetcar lineknown as the F Market & Wharves. Many weekday riders are commuters, as the daytime weekday population in San Francisco exceeds its normal residential population. Muni shares four metro stations with BART, which can lead to confusion amongst visitors. Travelers can connect to San Francisco International Airport and Oakland International Airport via BART.
Several routes operate 24 hours a day, such as the 38 Geary. Muni routes operate on a schedule, and the frequency of service varies at various times of day. Trip planning has been made easier by the implementation of GPS monitoring for most routes through NextBus, allowing for easier predictions of arrival times.
Express lines only run during peak hours (with the sole exception of the 8X Bayshore Express); during mornings they run towards downtown (theFinancial District) and during the evening they run away from downtown. All express lines have an "X", "AX", or "BX" following the line's number. Some lines are divided into A and B Expresses. The B Express line is shorter and has stops that are closer to downtown, while the A Express makes stops further away from downtown and will make few or no stops in the area where the B Express stops.
Limited lines also provide fast service along their routes. They make fewer stops than the standard line to achieve faster travel, but the stops are interspersed at greater intervals along the entire line. Express buses make frequent local stops near the origin and destination, but not in the middle. Limited buses take the same route as the regular line, while Express buses take a bypass route. All limited-stop lines have an "L" following the line's number.