The proposed concrete bridge design does not support trains other than light rail. Trains went as far as Chico. In the future, High Speed trains and regional trains are most likely to use the Bay Bridge. Express trains should augment BART since BART has always declined express service.
Travel time is the main criteria for travel mode choice.
Bay Bridge rail would also give a San Francisco downtown terminus at the Transbay Terminal vs. the current Caltrain station now proposed. Email from Mayor Willie Brown of San Francisco. The Truth about Trains by Mayor Ken Bukowski of Emeryville. Letter from Caltrans to Mayors rejecting the voters approval of allowing trains. Letter from MTS handed-out to the MTC Commissioners requesting allowing trains.