These "bookend" sections are being upgraded to be able to support HSR trains. In the two metropolitan areas at the north and south ends of Phase 1, the Authority is implementing a "blended system" plan in which HSR and local passenger trains share tracks. The Authority is in the process of constructing a self-sustaining Initial Operating Segment (IOS) in the Central Valley running from Merced, California to Bakersfield, California – a distance of about 171 miles (280 km). Phase 1 implementation is being divided into discrete sections. This summary is based on "Proposition 1A Factsheet" (2022),, the Authority's published 2022 Business Plan, and the Peer Review Group's 2022 report to the state legislature. Also, at this time there is no date set for the northward extension to San Francisco.Ī current summary of the project follows. Only four stations are initially planned: Merced, Fresno, Kings/Tulare, and Bakersfield. Note the current IOS is planned to only run from Merced to Bakersfield. Extending the IOS to connect to the north and south metropolitan segments is dependent on future funding, so its timing is uncertain. Maximum train speeds will be about 220 miles per hour (350 km/h) in the dedicated HSR segments and about 110 miles per hour (180 km/h) in the blended segments. The first of the pure HSR segments, the Initial Operating Segment, is planned to begin operations in the southern-part of the Central Valley in 2029. In the major metropolitan areas in the north and south of the state the HSR trains will share the tracks with local commuter rail in a "blended system", so those segments are currently being upgraded for HSR trains. In 2008, voters approved Proposition 1A, which authorized bonds to begin implementation, established a route connecting all the major population centers of the state, and set other requirements. Planning for the project began in 1996, when the California Legislature and Governor Jerry Brown established the California High-Speed Rail Authority, tasking it with creating a plan for the system and presenting it to the voters of the state for approval. California High Speed Rail (also known as CAHSR or CHSR) is a publicly funded high-speed rail system currently under construction in California in the United States.
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