The Richmond–Fremont line of the Bay Area Rapid Transit

Bay Area Rapid Transit

Bay Area Rapid Transit 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 operates five lines on of track with 44 stations in four counties...

 system in the San Francisco Bay Area

San Francisco Bay Area

The San Francisco Bay Area, commonly known as the Bay Area, is a populated region that surrounds the San Francisco and San Pablo estuaries in Northern California. The region encompasses metropolitan areas of San Francisco, Oakland, and San Jose, along with smaller urban and rural areas...

 of the United States consists of 18 metro station

Metro station

A metro station or subway station is a railway station for a rapid transit system, often known by names such as "metro", "underground" and "subway". It is often underground or elevated. At crossings of metro lines, they are multi-level....

s from Richmond

Richmond, California

Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7, 1905. It is located in the East Bay, part of the San Francisco Bay Area. It is a residential inner suburb of San Francisco, as well as the site of heavy industry, which has been...

 to Fremont

Fremont, California

Fremont is a city in Alameda County, California. It was incorporated on January 23, 1956, from the merger of five smaller communities: Centerville, Niles, Irvington, Mission San Jose, and Warm Springs...

. It passes through El Cerrito

El Cerrito, Contra Costa County, California

-Transportation:The city's primary transportation infrastructure consists of the El Cerrito Plaza and El Cerrito del Norte BART stations along with several local bus lines, operated by AC Transit, providing access to the surrounding area and the nearby cities of Albany, Berkeley and Richmond...

, Berkeley

Berkeley, California

Berkeley is a city on the east shore of the San Francisco Bay in Northern California, United States. Its neighbors to the south are the cities of Oakland and Emeryville. To the north is the city of Albany and the unincorporated community of Kensington...

, Oakland

Oakland, California

Oakland is a major West Coast port city on San Francisco Bay in the U.S. state of California. It is the eighth-largest city in the state with a 2010 population of 390,724...

, San Leandro

San Leandro, California

San Leandro is a city in Alameda County, California, United States. It is considered a suburb of Oakland and San Francisco. The population was 84,950 as of 2010 census. The climate of the city is mild throughout the year.-Geography and water resources:...

, Hayward

Hayward, California

Hayward is a city located in the East Bay in Alameda County, California. With a population of 144,186, Hayward is the sixth largest city in the San Francisco Bay Area and the third largest in Alameda County. Hayward was ranked as the 37th most populous municipality in California. It is included in...

, and Union City

Union City, California

Union City is a city in Alameda County, California, United States. It was incorporated in 1959, combining the communities of Alvarado and Decoto. Alvarado was the original county seat of Alameda County, and the site of the first county courthouse is a California Historical Landmark . The city...

. Throughout its journey, it shares its tracks with other lines. This was the first of BART's lines to begin regular service; on September 11, 1972, the first revenue-service trains began running between Fremont and MacArthur stations . It is also the only line of the entire BART network that does not serve the city of San Francisco.

BART lines are usually not referred to by the color that identifies them on official system maps, so this line is rarely called the Orange Line, and this term is never used by BART officials. Although it is the only line that serves only the East Bay, it is also rarely called the "East Bay Line" but is almost invariably called "Richmond–Fremont Line", to avoid confusion with all the other lines that provide service to various parts of the East Bay sub-region.

Currently the line is being extended to Warm Springs

Warm Springs (BART station)

Warm Springs will be an at-grade BART station in Fremont. Construction on the station began in fall 2010; it is scheduled to open in late 2015....

 and then to Berryessa

Berryessa (BART station)

Berryessa BART station is a future Bay Area Rapid Transit station scheduled to begin construction in the summer of 2012 and open in 2018 in San José, California as part of the Silicon Valley BART extension...

 in San Jose

San Jose, California

San Jose is the third-largest city in California, the tenth-largest in the U.S., and the county seat of Santa Clara County which is located at the southern end of San Francisco Bay...

. This line will be the only one to go past Warm Springs.