Proto-BART, Valencia Sky Train to Palo Alto
Eric Fisher has unearthed and scanned proto-BART plans from 1956. Some fascinating detail, including a Marin line routing along Kearny, Columbus and down Lombard (instead of Geary in later not-to-be plans).
Various alternatives were presented. One included underground stations for the Marin line at Lombard & Van Ness, with a tunnel under Russian hill to Columbus & Green, and a terminus at California & Kearny. Both elevated and suspended trains were considered.
A few different options were proposed for downtown.
One was a tunnel from the East Bay meeting with the Marin terminus at California, dodging over to Market as we know today, then continuing down Valencia.
The alternative would have come in from the East Bay over the Bay Bridge and run above Mission (with stops at 4th and 8th).
The Peninsula line would have dangled above Valencia (with stops at 14th and 22nd), then cut down Tiffany Ave to a tunnel at Dolores & San Jose, exiting around Bosworth, with a station at Ocean.
The plans show the line continuing south down the Peninsula to Palo Alto with a maintenance yard at Arastradero.
All sorts of crazy detailed suggestions for Marin, and past Palo Alto to Santa Clara / San Jose / Los Gatos (no 280 or 880 yet!) More can be seen on this system-wide map and the rest of the detailed maps on Eric’s Flickr stream.