Many poor people already can't afford to drive. In my city, over a third of households are carless and for most of them i can guarantee it's not by choice. Public transit is weak outside the core, the urban poor are by default locked out of suburban opportunities and job centers.

I imagine the situation is probably just as bad for the carless rural poor.

Car culture also locks out opportunity for other segments of the population - the young, the very old, the disabled.