[tech12]

There are way more BART riders than there are commuter rail riders between SF and Sacramento, and BART has always had mediocre coverage in SF, as well as a bottleneck and inadequate late night service, due to the single Transbay tube. And of course if the Bay Area is ever going to densify in a way even approaching what's necessary, we're gonna need improved transit. So it seems like a second BART tube (plus a new subway down Geary blvd/19th ave, not to mention the new stops in Alameda and Jack London square) would be most useful for Bay Area residents, if we have to pick just one new tunnel...of course building both the BART and commuter rail tunnels would be the best option though.

Imagine if Caltrain crossed the Bay, and went to say, Oakland, Emeryville, Berkeley, Richmond, Martinez, Benicia, Vallejo, Napa, etc. And then 100 years later, maybe there would be HSR to Sacramento too lol.