Probably the Salesforce Transit Center. https://en.wikipedia.org/wiki/Transbay_Transit_Center https://en.wikipedia.org/wiki/Transbay_Transit_Center It's a som

Probably the Salesforce Transit Center. https://en.wikipedia.org/wiki/Transbay_Transit_Center https://en.wikipedia.org/wiki/Transbay_Transit_Center It's a somewhat shiny bus terminal near downtown San Francisco which is now actually used a lot (though it would have been used a lot more if not for COVID and work-from-home). It has a basement level prepared for the California High-Speed Rail (the original subject of the article we're discussing) but it doesn't connect to Caltrain, BART, or Muni Metro, although the latter two are a relatively short walk away.