SOMA-High Rising-Transbay Transit Center (Under Construction)-20/25
Main article: Transbay Transit Center
Designed by Pelli Clarke Pelli, the new Transbay Transit Center will replace the former Transbay Terminal at a cost of roughly USD$4.5 billion and has been dubbed the “Grand Central Station of the West” by proponents. The new center will eventually include an extension of Caltrain into the station from the current Caltrain Depot at 4th and King Streets in Mission Bay via tunnels which will also carry the Bay Area segment of the future California High-Speed Rail and terminate at the station.
The Transit Center will have five levels plus a 5.4-acre (2.2 ha) public rooftop park. The lowest level will house the train platforms, and the level above it will be called the “Lower Concourse”. The next level will be the street entrance to the Transit Center. Above that will be the “Second Level”, which will have administrative offices and potential retail shops. The last transit level will service local buses from San Francisco’s Muni, the East Bay’s AC Transit, Golden Gate Transit from Marin and SamTrans from San Mateo County. Also Greyhound and Amtrak will have berths on this deck.