What happens when you go through years of planning and actually building TODs, only to have the T suddenly vanish?

This is the question on the San Francisco Peninsula and in the South Bay, where Caltrain is proposing radical service reductions and the closure of numerous stations.

It's also a question that other places are likely to confront as public budgets grow more austere and the Republican Party ramps up its attacks on seemingly all transportation that doesn't involve automobiles.

The proposed Saltworks project in Redwood City is, as one of its designers says, a potential "game changer" for the Bay Area. Proposed by landowner Cargill and developer DMB, the project would provide 8,000 to 12,000 high-density, mixed-income housing units in a decidedly suburban town halfway between San Francisco and San Jose, and within close proximity to hundreds of thousands of jobs.

The Bay Area has seen similar projects in recent years, but they have been in San Jose and San Francisco proper. Even those suburbs that have embraced relatively dense, transit-oriented development haven't seen anything on the scale of Saltworks.

These days, the California High-Speed Rail Authority might as well be called the Political Traction Company. After winning voter approval of a $9.9 billion bond in November, the authority seemed to become a favorite of the Obama administration, which is eager to fund high-speed rail construction. In addition, some Central Valley communities � such as Fresno and Bakersfield, where stations are set to be built � are eager to see the project advance. Nevertheless, cities along the Peninsula of San Mateo and Santa Clara counties are asking questions about the project.