So sad ... so sad and lame. BRT is such a half-assed, half-cracked solution.[1]
What's even more lame is the fact that the one new subway built in 40 years is very short and doesn't extend to its obvious, natural limits - fisherman's wharf.
Billions of dollars and 40 years later, you can finally walk downstairs, buy a ticket, wait a few minutes, ride a train, walk back upstairs all to avoid walking 6 blocks.
[1] To be fair, I have seen it work in Boulder (hop/skip) and in the roaring fork valley (Aspen) but these are low density places where real public transit (subway and light rail) are not workable. Unlike San Francisco.