Quote:
Originally Posted by alchemist redux
Instead of a second BART tunnel, would it make sense to extend a heavy rail HSR/Caltrain tunnel across the Bay instead? This would turn Transbay into a through station. At the east portal, it could effectively become a wye, where the current Capitol Corridor - in both directions - could be electrified.
I don't know the logistics or cost differential of this, but some of the things this would allow would be more direct SF-Sacramento HSR service, and an alternative one seat route from the East Bay through Silicon Valley to San Jose.
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MTC is actually studying this alternative. Here is one of their maps of a 4 track BART/heavy rail transbay tube that can be used by both Caltrain and BART. The BART tube continues through to to the west. I am unsure if they are still putting the south facing tail tracks on the new TTC. I think they were also looking at high(ish) speed electrified Capital Corridor trains being diverted into the City (some of them, obviously some will continue to the South Bay suburbs).
