US transportation secretary Ray LaHood has awarded a $928.6M (£631M) grant to the California High Speed Rail Authority so it can start building the first phase of its high speed rail project.
Construction will begin next year in Fresno.
The grant, combined with state support and previously-awarded federal cash, will fund the construction of the first usable segment of the California system in the Central Valley.
California is one of 32 states across the US that are planning some form of high speed rail corridors.
California’s would see trains running at up to 350km/hr.