I'm often in San Francisco being that it's only a quick shuttle flight from L.A. and I usually stay up on Lombard at the Cow Hollow which gives me a great shot at seeing the GGT RTS's and 4500's comin ...
I had to chuckle a bit. I live in San Francisco where the buses don't rust, but they get abused far beyond what you'll see in most cities because of the high density, loads of hills, and 24x7 service ...