Comment by runako
1 hour ago
Exactly all of this. HSR in the US makes a lot more sense if you look at it as a regional phenomenon. Atlanta<->Miami, DC<->NYC, NYC<->Chicago, Houston<->Dallas, Chicago<->Nashville. Those all fit the prescription of being around the same time as driving.
Miami<->Seattle is not going to fit neatly in HSR. The distance is too great. A realistic HSR network in the US will also involve changing trains in the midwest because there are too many pairs of big cities involved. Miami<->SF, Atlanta<->LA, DC<->SF, Philadelphia<->Phoenix, etc.
The other hindrance for HSR in the US is our family sizes. "It's about the same time to drive" is a solid argument for 1 traveler, it's less so for 4 travelers with 4 HSR tickets. Many people will keep driving shorter distances for this reason alone.
I have regularly taken two-day trips in the US because the cost of an airplane for 5 is much more than the cost of my car even including hotel rooms. Lately I've been taking Amtrak, which is a little bit cheaper, but it's still annoying enough that I would only do it because I hate driving.
It also helps the economics to realize that there are very few places in the US that anyone would go that not having a personal car is a reasonable thing and so you have to have the cost of a rental car to anything other than grabbing your own.