High-speer rail demo outside the Capitol in Sacramento

13.5-mile tunnel will make or break California's bullet train

A critical part of California's high-speed rail project is a 13.5-mile tunnel through the Diablo Range — a landmark project whose costs may greatly exceed initial expectations. "This is not good news for taxpayers of California," says civil engineering professor William Ibbs, who has consulted on similar rail projects around the world.

Topics: Berkeley Engineering in the News, Civil engineering, Infrastructure, Transportation