> High speed rail make sense in corridors that have a large number of big population centers that are just far enough where driving is not a great solution so

> High speed rail make sense in corridors that have a large number of big population centers that are just far enough where driving is not a great solution so exactly SF Bay Area (7.5 MM people) to LA Area (13.5 MM people). Distance 350 miles or 560km. 1 hr flight is inefficient with starts/landing/checkin/checkout/TSA/infrastructure costs/getting in and out of airports etc Proper high speed rail like Shinkansen could do it in 2-2.5 hours easily. (same distance as Tokyo to Osaka, which is the OLDEST Shinkansen line)