"If there is more pent-up demand than total possible road capacity, then there will never be enough capacity."
That is a tautology.
With tunnels you can probably increase capacity by 100 times without going very deep. That would support some kind of crazy Hong Kong level density of people in the whole LA basin. Everyone in the US could live there. After that happens one can worry about this infinity demand potential.
With tunnels you can probably increase capacity by 100 times without going very deep. That would support some kind of crazy Hong Kong level density of people in the whole LA basin. Everyone in the US could live there. After that happens one can worry about this infinity demand potential.