Except they're not fine with that. In Southern California it's basically solid humanity from the ocean to the deserts in the east. The existing freeways can't b

Except they're not fine with that. In Southern California it's basically solid humanity from the ocean to the deserts in the east. The existing freeways can't be expanded, there's nowhere for them to expand into. Businesses and houses butt right up against all of the freeways. This is the same problem with rail lines there. There's nowhere to build new rail lines. People live and work anywhere you might want to lay track. Trying to build tracks or roads is complicated by geography. There's tons of hills that are impractical to tunnel through and there's a fairly steep grade from the coast to inland areas. The train tracks exist where tracks are most practical.