70k people go through the transbay tube... 270k vehicles cross the Bay Bridge every day In other words, taking your figures painfully literally, if those vehic

70k people go through the transbay tube... 270k vehicles cross the Bay Bridge every day In other words, taking your figures painfully literally, if those vehicles carpooled just one additional passenger each on average, you'd have 4 times the added throughput that BART provides. But this will never happen as long as we give HOV lane access to cars other than those carrying 2+ licensed drivers... for political reasons.