(a) I’m writing this from the DC-Boston overnight train, doing about 110 mph through NJ. LOVE not having to drive or deal with the suck of flying ca. 2012.
(b) Source of power (I.e. electric) is relevant, since it can use clean sources like nuke, hydro, or renewable
(c) Agreed with the idea of upgrading the coastal rail line to 3 tracks and medium speed standards. Say 100-120 mph were possible, electrified. Where it’s owned by a private railroad, pay THEM to upgrade. There seem to be more people at intermediate coastal stops than out in the desert!!
(d) with (c), modify the route to run direct to SF rather than to Oakland, of course.