Mountain View is a city in Santa Clara County, California, United States. Named for its views of the Santa Cruz Mountains, it has a population of 82,376 as of the 2020 census.
Caltrain is a California commuter rail line serving the San Francisco Peninsula and Santa Clara Valley. The southern terminus is in San Jose at Tamien station with weekday rush hour service running as far as Gilroy. The northern terminus of the line is in San Francisco at 4th and King Streets. Caltrain has 28 regular stops, one limited-service weekday-only stop, one weekend-only stop (Broadway), and one football-only stop (Stanford). While average weekday ridership in 2019 exceeded 63,000, impacts of the COVID-19 pandemic have been significant: in August 2022, Caltrain had an average weekday ridership of 18,600 passengers.
California High-Speed Rail is a publicly funded high-speed rail system currently being developed in California in the United States. In 1996, the California Legislature and Governor Pete Wilson established the California High-Speed Rail Authority with the task of creating a plan for the system and then presenting it to the voters of the state for approval. In 2008, voters approved the plan given in Proposition 1A, which specified a route connecting all the major population centers of the state, authorized the issuance of bonds for beginning implementation, and established other requirements.
Downtown Mountain View station is an intermodal transit station providing public bus and rail service, located in Mountain View, California. The station is served by the Caltrain commuter rail service, for which it is simply called Mountain View station. Santa Clara VTA Orange Line light rail service is provided to an adjacent, dedicated light rail facility, known as Downtown Mountain View station. VTA local transit bus and employer-operated shuttle services are accommodated from the Mountain View Transit Center on the Evelyn Avenue side of the station.
Palo Alto station is an intermodal transit center in Palo Alto, California. It is served by Caltrain regional rail service, SamTrans and Santa Clara VTA local bus service, Dumbarton Express regional bus service, the Stanford University Marguerite Shuttle, and several local shuttle services. Palo Alto is the second-busiest Caltrain station after San Francisco, averaging 7,764 weekday boardings by a 2018 count. The Caltrain station has two side platforms serving the two tracks of the Peninsula Subdivision and a nearby bus transfer plaza.
22nd Street station is a Caltrain commuter rail station located south of 22nd Street between the Dogpatch and Potrero Hill neighborhoods of San Francisco, California beneath the Interstate 280 freeway viaduct. The only below-grade Caltrain station, it is bracketed on the north and south by two tunnels which take the line under the eastern slope of Potrero Hill. The station is also served by Muni routes 48 and 55.
Bayshore station is a Caltrain commuter rail station in the Visitacion Valley neighborhood of San Francisco, California. The station is on the border of San Francisco and the neighboring city of Brisbane. The parking lot and the northern section of the station are in San Francisco, while the remainder is in Brisbane. The station address is in San Francisco proper.
South San Francisco station is a Caltrain station in South San Francisco, California. The station is on the east side of the Bayshore Freeway, east and south of the curved Grand Avenue overpass, and north of where the freeway crosses over the tracks. Downtown South San Francisco is to the west, across the freeway. It previously underwent a substantial modernization and expansion project, completed in January 2022.
San Bruno station is a Caltrain station located in San Bruno, California. The station is located just northeast of downtown San Bruno, above the intersection of San Mateo and San Bruno Avenues, adjacent to Artichoke Joe's Casino.
Broadway station is a Caltrain station in Burlingame, California. Caltrain only serves the stop on weekends and holidays; weekday service is provided by a bus shuttle to nearby Millbrae station.
San Mateo station is the northernmost of the three Caltrain stations in San Mateo, California. It is in downtown San Mateo.
Hillsdale station is one of three Caltrain stations in San Mateo, California. The station is next to the Bay Meadows neighborhood and close to the Hillsdale Shopping Center.
Hayward Park station is one of three Caltrain stations in San Mateo, California. It is located just to the north of the State Route 92 overcrossing, about 1,200 ft (370 m) south of the site of the original Southern Pacific station in Hayward Park. It was relocated in 1999 because of a lack of parking at the original site, and because the previous station had been sited along a curve in the tracks near 16th Avenue. The present station has two side platforms, with at-grade signalized and gate-protected pedestrian/bicycle crossings of the tracks at both its north and south ends.
Castro Station was a Caltrain station located in Mountain View, California, just south of the railroad crossing at Rengstorff Avenue. It was replaced by the newer San Antonio station, which opened 0.8 miles (1.3 km) to the north in April 1999.
Paul Avenue was a Caltrain station located in the Bayview neighborhood of San Francisco, California. The lightly used station was closed on August 1, 2005, and the platform and shelter were removed in 2009. A replacement station to the north has been proposed.
The construction of the California High-Speed Rail system is an undertaking by the California High-Speed Rail Authority. The project is expected to span about 800 miles (1,300 km) and will be completed in two phases:
The Caltrain Express (CTX) project was implemented from 2002 to 2004 and led to the establishment of the Baby Bullet express service, which shortened the transit time between San Francisco and San Jose, and certain stations in between. New locomotives and rolling stock were purchased for dedicated express service, bypassing most stations; quad-track overtake sections were added in two locations along the Peninsula Corridor right-of-way to allow express trains to pass slower local trains that were making all stops; tracks were also upgraded with continuous-welded rail; a centralized traffic control system was added; and crossovers were added every few miles to allow single-tracking trains around disabled trains. Congresswoman Jackie Speier, then serving as a California State Senator, is credited with securing the funding for CTX and one of the new locomotives acquired for the project is named for her as a result. During commute hours, the Baby Bullet is up to 20% faster than driving south from San Francisco to San Jose.
The Caltrain Modernization Program (CalMod), sometimes referred to as the Caltrain Electrification Project, is a $2.44 billion project that will add a positive train control (PTC) system and electrify the main line of the U.S. commuter railroad Caltrain, which serves cities in the San Francisco Peninsula and Silicon Valley, as well as transition from its current diesel-electric locomotive powered trains to electric multiple units (EMU). According to Caltrain, electrification of the tracks will allow it to improve service times via faster acceleration and shorter headways, reduce air pollution and noise, and facilitate a future railway tunnel into downtown San Francisco's Salesforce Transit Center, as diesel trains cannot serve underground stations.
The Downtown Rail Extension (DTX) is a planned second phase of the San Francisco Transbay Transit Center (TTC). When complete, it will extend the Caltrain Peninsula Corridor commuter rail line from its current northern terminus at 4th and King via a 1.3 mi (2.1 km) tunnel. The new terminus will be near the Financial District and will provide intermodal connections to BART, Muni, Transbay AC Transit buses, and long-distance buses. In addition, the California High Speed Rail Authority (CHSRA) plans to use DTX and the Caltrain-owned Peninsula Corridor for service on the CHSRA San Francisco–San Jose segment. Because DTX uses a long tunnel, current diesel locomotives are not suitable and the Caltrain Modernization Project (CalMod), which includes electrification of the line and acquisition of electrified rolling stock, is a prerequisite.
VTA: 21 
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