This brings up an interesting question. What street(s) in SF would be best for a truly automobile free pedestrian mall? My first thought would be the embarcadero, but it already has a very nice wide sidewalk and I think closing it to cars would be a pretty large hindrance to traffic.
Yeah, the Embarcadero is already pretty pedestrian friendly and it's a rather essential thoroughfare that can't be easily bypassed.
In downtown-ish area? Presumably in and around Union Square somewhere. You already have a mini restaurant version in Belden Place. There's a lot of traffic through there but it was already being messed with by lots of construction for ages.
