The poor people living in Boston live in Roxbury and Dorchester. Coincidentally, these are the areas with by far the worst car dependency and worst public transit in the city.

I've worked extensively with impoverished Cape Verdean populations in specifically those neighborhoods and lots if not most do not have a car.

Apologies, I was basing my take there on having biked through most neighborhoods and witnessing the worst traffic by far in those areas, so it certainly feels as though the car density is the highest. (It's also the only place I've ever been hit on a bicycle, and then had someone behind me get mad for being in the way while I was picking myself back up)

That sounds awful. Impoverished areas are well known for lacking traffic calming measures leading to higher pedestrian and bike accident, this is certainly true in my home city of DC.

On the flip side, Boston is the only city where I've ever hit a car with my bike.