The end is nigh for gas-powered cars
theverge.com
theverge.com
This seems off by a matter of scale; 100 years ago, the average car was the Model T; and in 1929 (94 years ago) 20% of Americans owned a car - 1 car per household.
The highway act didn't pass until 1956 (67 years ago), much less was it constructed.
Finally, we have the internationalization of the automobile and other manufactures being bigger than the US, and 100k mile cars; starting in the 70s, but Toyota didn't produce more than GM until 2021.
Consider the Roman and Medieval patterns that still persist in much of the European cityscape.. Ironically, these make for a much less expensive return to non motorized personal transportation (which was never a good fit for cities designed around animal powered vehicles). The design decisions that were common sense in the America of the Highway Act era - which are still being built out - are likely to have huge impact on future transport infrastructure decisions for much longer than a single century.
In places away from the cities, the ICE vehicles will remain for a long time. Mainly because the infrastructure of the electrical grid would need to be upgraded first, and that is probably too expensive per unit. (Lots of long-run high-tension cables to service very few customers = big bikkies.)
When it comes to infrastructure, the suburbs are subsidizing everyone else. As (if?) they transition, it will get a lot more expensive to reliably serve other areas. The wealthy rural denizens will be fine, and will likely transition to EV-dominated transportation. Large farming concerns will have no problem whatsoever getting fuel delivered.
And everyone else is screwed. The time to start adaptation is now. I’m reminded of when I was growing up. None of the kids I knew living on farms drove F-150s and Silverados as daily drivers. They all had fuel-efficient vehicles as runabouts. Like it or not, that’s going to have to come back. For a lot of rural people, the next car they buy is going to be the one they’re stuck driving when gas gets permanently expensive (and slightly harder to get).
There are huge issues with the suburbanization approach to rural areas as you allude to.
In the area of electric infrastructure, there is a strong tradition of rural co-ops, who originally electrified many remote rural areas, but most of them have now become reliant on the large monopoly energy providers. There is a discussion of the issue here:
My understanding was that suburbs are subsidised by everyone else. Here is an infographic that came up when I searched to see if I was wrong: https://i.imgur.com/2rgkaOZ.jpg