Maybe mandatory spacing like the English.
But since originally there were 2 sets of commuter train tracks on the Bay Bridge, i propose using 3 of the reverse commute lanes, leaving 2. Not enough?
Maybe making both levels commute direction only, as the Bay Bridge is the most heavily used bridge in the Bay Area.
This would be relatively cheap and easy to do, versus building a second bridge just South.
So from 6-9am and 3-6pm both levels would be one way. M-F.
BART is not helping enough.
Neither is Caltrain south to Silicon Valley and Gilroy.
Many more passenger ferries is another idea. Maybe fast air ride craft, like on the English Channel.
But SOMETHING must be done!
Too many streets in SF are gridlocked by Bay Bridge commute approaches!