In the web article mentioned previously there is also this bit of news:

Twenty years ago, lobbyists convinced the California legislature that Amtrak’s buses, which provide connections from its stations to cities near and far, was a form of unfair competition for private bus companies. So it banned the sale of Amtrak bus tickets to anyone who was not also taking a train ride as part of the trip.

That means that Amtrak, a rail company, runs buses with decreasing federal subsidies that do not fill to capacity, and that empty out as they get farther from their point of origin. It also means that potential bus passengers throughout the state – notably in many places not served by private bus companies – are left without any transit options to travel out of their cities, unless they also buy a train ticket they don’t need.

Senator Ben Allen (D-Santa Monica) wrote S.B. 742 to fill Amtrak buses, both to serve California residents by offering more transit options and to help Amtrak connecting buses operate more cost-effectively.

This bill is waiting for a vote on the Assembly floor.