Just imagine if the kids had to walk to schoolPretty sure that if things got really dire, lots of (not all obviously) of people now have the capability to work from home, saving fuel for those that most need it. Similarly to save fuel you can opt to not carry out certain journeys via a car, or share you car with friends/neighbours if you are going to the supermarket etc. or even good old fashioned car sharing to work if you have someone on your route.
Maybe it is time the current generation start to apricate what they take for granted, I can't imagine how well some people would cope with true war time rationing.