[bombcar]

That's the hardest part - people will drive 6+ hours even when there are faster/better options if they need a car at the other end.

So transit between cites doesn't work as well until the endpoints are adequately transited themselves (or your destination is something like an airport where you can't bring your car anyway).

[ghaff]

At one point I was doing quite a bit of driving between New Orleans and a worksite in Pascagoula (just across the MS/AL state line from Mobile). This wouldn't have been very interesting at all given Pascagoula was very spread out and I absolutely needed a car once I was there. And it's a pretty straightforward ~2.5 hour drive.

Taking the train to NYC by contrast a car is, in general, actively a negative thing once you arrive.