Cal. Penal Code § 625c

Any person who, with the intent to cause great bodily injury to another person, willfully removes, tampers with, injures or destroys any passenger transit vehicle or the contents or parts thereof, or who willfully removes, tampers with or destroys, or places an obstruction upon any part of the transit system, including its right-of-way, structures, fixtures, tracks, switches or controls, or who willfully sets a vehicle in motion while it is at rest and unattended is guilty of a felony.