I think by 2050, Chico CA (1hour N. of Sacramento)will have doubled or trippled its population, aiming at a sort of smaller town experience to those who are sick of the megaopolis of the Sacramento-Bay Area. It'll be a combination of new urbanist type single family neighborhoods, and lofts and such in the downtown areas. The existing typical sprawl will probably just become housing for those just starting out financially, as the houses will be falling apart and affordable . Maybe a light rail or something. Transportation will still be by private (hydrogen) vehicle,at least for long distances. I imagine major freeways and throughfares will be computer controlled for optimum speed and efficiency, however once off the high capacity transportation grid, manual driving will resume. I envision that the system will be expanded as needed. As for the nearest large metropolitian area , I think the area between Sacramento and The Bay Area will become another suburban wasteland in about a decade or so since its so close to two large employment centers, and will probably be redeveloped around 2040-50. Downtown Sac will continue to become more of a downtown. Probably a BART/ rapid transit connection to the bay. Or those of us left will be looking for twinkies to survive on after the nuclear holocaust.