California High Speed Rail Project overview
California High Speed Rail Project overview

April 2018: California is pushing ahead with construction of its dedicated high speed rail service between San Francisco and Sacramento in the north to Los Angeles and San Diego in the south with construction already well advanced in the Central Valley section. Routes the the Pacheco Pass in the north and through the Tahachepi and San Gabria Mountains in the south will require 45 miles to 50 miles (72km to 80km) of tunnels ranging in length individually from several thousand feet to more than 20 miles (32km) and under a covers exceeding 2,000ft (610m). An overview provides the goals and current progress of the project.


References
California high speed rail designs - TunnelTalk, April 2018