Highway Revolt, Mission Freeways, “The Circumferential”
StreetsblogSF has an excellent review of San Francisco freeways that might have been but thankfully never were. (We here at the BJTPD (Burrito Justice Transit Planning Division) covered the plans for a Mission Freeway a few months back.)
Through actual “reporting” and “research”, our friends at Streetsblog came up with many more maps and plans from the middle of last century. (We are suckers for maps, perhaps even “map ho’s” — put a old map in your blog and it stands an excellent chance of getting referenced here.)
Anyway, I found this strip of maps to be particularly excellent/sobering:
If you got BART or Muni with its own right of way along the path of any of those planned highways from the 40s and 50s, then we are talking some real transit. Imagine a train along the “Circumferential” / “Crosstown”? Oh man.
Burrito Justice 
Two things I’d still like to see: the Van Ness-Market roundabout in the 1945 plan, and the “Southern Crossing” bridge.
Ditto on both – i love roundabouts. Though I’d rather have a second transbay tube first.