San Francisco Bay Area in the context of "AC Transit"

The Randstad (Dutch pronunciation: [ˈrɑntstɑt] ; "Rim City" or "Edge City") is a roughly crescent- or arc-shaped conurbation in the Netherlands, that includes almost half the country's population. With a central-western location, it connects and comprises the Netherlands' four biggest cities (Amsterdam, Rotterdam, The Hague, and Utrecht), their suburbs, and many towns in between, that all grew and merged into each other. Among other things, it includes the Port of Rotterdam (the world's busiest seaport outside Asia), the Port of Amsterdam (Europe's fourth-busiest seaport), and Amsterdam Airport Schiphol (Europe's fourth-busiest airport). With a population of approximately 8.4 million people it is one of the largest metropolitan regions in Europe, comparable in population size to the Rhine-Ruhr metropolitan region or the San Francisco Bay Area, and covers an area of approximately 11,372 km (4,391 sq mi). The Randstad had a gross regional domestic product of €510 billion in 2022, making it the second most productive region in the European Union, only behind the Paris metropolitan area. It encompasses both the Amsterdam metropolitan area and Rotterdam–The Hague metropolitan area. It is part of the larger Blue Banana megalopolis.

The Randstad's main cities are Almere, Amsterdam, Delft, Dordrecht, Haarlem, The Hague, Leiden, Rotterdam, and Utrecht. Other cities and towns include Alkmaar, Alphen aan den Rijn, Amersfoort, Amstelveen, Capelle aan den IJssel, Gouda, Heerhugowaard, Hilversum, Hoofddorp, Hoorn, Lelystad, Nieuwegein, Purmerend, Rijswijk, Schiedam, Spijkenisse, Vlaardingen, Zaandam, Zeist, and Zoetermeer.

Sonoma (/səˈnoʊmə/) is a city in Sonoma County, California, United States, located in the North Bay region of the San Francisco Bay Area. Sonoma is one of the principal cities of California's Wine Country and the center of the Sonoma Valley AVA. Sonoma's population was 10,739 as of the 2020 census, while the Sonoma urban area had a population of 31,479. Sonoma is a popular tourist destination, owing to its Californian wineries, noted events like the Sonoma International Film Festival, and its historic center.

Sonoma's origins date to 1823, when Padre José Altimira established Mission San Francisco Solano, under the direction of Governor Luis Antonio Argüello. Following the Mexican secularization of the missions, Californio statesman Mariano G. Vallejo founded Sonoma on the former mission's lands in 1835. Sonoma served as the base of General Vallejo's operations until the Bear Flag Revolt in 1846, when American filibusters overthrew the local Mexican government and declared the California Republic, ushering in the American Conquest of California.

San Francisco, officially the City and County of San Francisco, is a commercial, financial, and cultural center of Northern California. With an estimated population of 827,526 residents as of 2024, San Francisco proper is the fourth-most populous city in the U.S. state of California and the 17th-most populous in the United States. Among U.S. cities proper with over 300,000 residents, San Francisco is ranked second by population density, first by per capita income, and sixth by aggregate income as of 2023. Depending on how its borders are defined, the broader San Francisco metropolitan area or San Francisco Bay Area is home to 4.6–9.2 million residents. In 2024, the U.S. Census Bureau reported an estimated population of 4,648,486 for the city's metropolitan statistical area (13th-largest in the U.S.) and 9,164,058 residents for the larger combined statistical area (5th-largest).

Prior to European settlement, the modern city proper was inhabited by the Yelamu Ohlone. On June 29, 1776, settlers from New Spain established the Presidio of San Francisco at the Golden Gate, and the Mission San Francisco de Asís a few miles away, both named for Francis of Assisi. The California gold rush of 1849 brought rapid growth, making it the largest city on the West Coast at the time. In 1856, San Francisco became a consolidated city-county. After three-quarters of the city was destroyed by the 1906 earthquake and fire, it was quickly rebuilt, hosting the Panama–Pacific International Exposition nine years later. In World War II, it was a major port of embarkation for naval service members shipping out to the Pacific Theater. After the war, the confluence of returning servicemen, significant immigration, liberalizing attitudes, the rise of the beatnik and hippie countercultures, the sexual revolution, opposition to U.S. involvement in the Vietnam War, and other factors led to the Summer of Love and the gay rights movement, cementing San Francisco as a center of liberal activism.

San Francisco Bay is a large tidal estuary in the U.S. state of California, and gives its name to the San Francisco Bay Area. It is dominated by the cities of San Francisco, San Jose, and Oakland.

San Francisco Bay drains water from approximately 40 percent of California. Water from the Sacramento and San Joaquin rivers, and from the Sierra Nevada mountains, flow into Suisun Bay, which then travels through the Carquinez Strait to meet with the Napa River at the entrance to San Pablo Bay, which connects at its south end to San Francisco Bay. It then connects to the Pacific Ocean via the Golden Gate strait. However, this entire group of interconnected bays is often called San Francisco Bay. The bay was designated a Ramsar Wetland of International Importance on February 2, 2013, and the Port of Oakland on the bay is one of the busiest cargo ports on the west coast.

Oakland is a city in the East Bay region of the San Francisco Bay Area in the U.S. state of California. It is the county seat of and the most populous city in Alameda County, with a population of 440,646 in 2020. A major West Coast port, Oakland is the most populous city in the East Bay, the third most populous city in the Bay Area, and the eighth most populous city in California. It serves as the Bay Area's trade center: the Port of Oakland is the busiest port in Northern California, and the fifth- or sixth-busiest in the United States. A charter city, Oakland was incorporated on May 4, 1852, in the wake of the state's increasing population due to the California gold rush.

Oakland's territory covers what was once a mosaic of California coastal terrace prairie, oak woodland, and north coastal scrub. In the late 18th century, it became part of a large rancho grant in the colony of New Spain, and was known for its plentiful oak tree stands. Its land served as a resource when its hillside oak and redwood timber were logged to build San Francisco. The fertile flatland soils helped it become a prolific agricultural region. In the 1850s, what became the first campus of the University of California was founded in Oakland, and Oakland was selected as the western terminal of the Transcontinental Railroad in 1869. The following year, Oakland's Lake Merritt became the United States' first officially designated wildlife refuge, now a National Historic Landmark. Following the catastrophic 1906 San Francisco earthquake, many San Francisco citizens moved to Oakland, enlarging the population, increasing its housing stock, and improving its infrastructure. It continued to grow in the 20th century with its port, shipyards, and manufacturing industry. In the 21st century, between 2019 and 2023, after the city and county refused requests for hundreds of millions of dollars in benefits to the privately owned teams, Oakland lost three teams of the major North American sports leagues within a span of five years.

The Key System (or Key Route) was a privately owned company that provided mass transit in the cities of Oakland, Berkeley, Alameda, Emeryville, Piedmont, San Leandro, Richmond, Albany, and El Cerrito in the eastern San Francisco Bay Area from 1903 until 1960, when it was sold to a newly formed public agency, AC Transit. The Key System consisted of local streetcar and bus lines in the East Bay, and commuter rail and bus lines connecting the East Bay to San Francisco by a ferry pier on San Francisco Bay, later via the lower deck of the Bay Bridge. At its height during the 1940s, the Key System had over 66 miles (106 km) of track. The local streetcars were discontinued in 1948 and the commuter trains to San Francisco were discontinued in 1958. The Key System's territory is today served by BART and AC Transit bus service.

Silicon Valley is a region in Northern California that is a global center for high technology and innovation. Located in the southern part of the San Francisco Bay Area, it corresponds roughly to the geographical area of the Santa Clara Valley. The term "Silicon Valley" refers to the area in which high-tech business has proliferated in Northern California, and it also serves as a general metonym for California's high-tech business sector.

The cities of Sunnyvale, Mountain View, Palo Alto and Menlo Park are frequently cited as the birthplace of Silicon Valley. Other major Silicon Valley cities are San Jose, Santa Clara, Redwood City and Cupertino. The San Jose Metropolitan Area has the third-highest GDP per capita in the world (after Zurich and Oslo), according to the Brookings Institution. As of June 2021, it also had the highest percentage of homes valued at $1 million or more in the United States.

San Jose, officially the City of San José (/ˌsæn hoʊˈzeɪ, -ˈseɪ/ SAN hoh-ZAY, -⁠SAY; Spanish: [saŋ xoˈse]), is a cultural, commercial, and political center within the San Francisco Bay Area and Silicon Valley. With a city population of 997,368 and a metropolitan area population of 1.95 million, it is the most populous city in both the Bay Area and Northern California and the 12th-most populous in the United States. Located in the center of the Santa Clara Valley on the southern shore of San Francisco Bay, San Jose covers an area of 179.97 sq mi (466.1 km) and is the county seat of Santa Clara County.

Before the arrival of the Spanish, the area around San Jose was long inhabited by the Tamien nation of the Ohlone people. San Jose was founded on November 29, 1777, as the Pueblo de San José de Guadalupe, the first city founded in the Californias. It became a part of Mexico in 1821 after the Mexican War of Independence. Following the U.S. Conquest of California during the Mexican–American War, the territory was ceded to the United States in 1848. After California achieved statehood two years later, San Jose served as the state's first capital. San Jose experienced an economic boom after World War II, with a rapid population growth and aggressive annexation of nearby communities in the 1950s and 1960s. The rapid growth of the technology industry in Silicon Valley further accelerated the city's transition from an agricultural center to an urbanized metropolitan area, prompting Mayor Tom McEnery to adopt San Jose's current motto, "Capital of Silicon Valley", in 1988. Results of the 1990 U.S. census indicated that San Jose had surpassed San Francisco in population. By the early 2000s, San Jose was California's fastest-growing economy.