What I remember most about Market Street in San Francisco when I lived there nearly twenty-five years ago was that it was not very clean. I don’t really remember what traffic was like, although I remember how bad was the “bunching” of buses (a nightmare transit scenario which then seemed to follow me to Portland). San Francisco just approved making Market Street car-free starting next year, and for all of how much Portland likes to think of itself as a town of urban planners, I can’t imagine any city administration here ever having the courage to make anything in this town car-free.