Rail infra investment stopped after ww2 and never restarted. All of these railroad engine power train tech improvements may have happened, but the rails on ground infrastructure peaked in the 1950's .
Interstate highways also made most of the US accessable to heavy aircraft in case an emergency airport needed to be assembled on short notice. It's a network of runways. Interestingly, the German Autobahn has a lot more curves, but it's debatable if that is to make them harder to bomb or to keep drivers awake.
Also many US cities had full fledged local rail systems that were paved over to make way for roads and cars.
Nope. The interstate highway system followed the railroad system. It also followed world war 2. https://en.m.wikipedia.org/wiki/Interstate_Highway_System
Rail infra investment stopped after ww2 and never restarted. All of these railroad engine power train tech improvements may have happened, but the rails on ground infrastructure peaked in the 1950's .
Interstate highways also made most of the US accessable to heavy aircraft in case an emergency airport needed to be assembled on short notice. It's a network of runways. Interestingly, the German Autobahn has a lot more curves, but it's debatable if that is to make them harder to bomb or to keep drivers awake.
Also many US cities had full fledged local rail systems that were paved over to make way for roads and cars.