When you go into the Northeast, a lot of narrower roads were planned for slow-moving horse-drawn carts.

The vast, _vast_ majority of such infrastructure was turn down in the 60s to make way for the almighty automobile.

The number of places in the north american continent that retain their street focused infrastructure is pretty much countable on one hand, and most of that is being terribly managed.

Exactly go Worcester, Providence and Boston and be in awe at how fucking horrendous the maze is.

Boston is only horrendous in a car. Walking around and taking public transit in Boston is very nice. OTOH Providence feels like it's designed for cars, much easier to drive there but always need the car around and their highways and roads are terrible. There's a ton of highway to split the city. Worcester is less highway constricted but still definitely need a car to get around and I still can't figure my way around.

Horse-drawn carts are not any narrower than cars are, and many place (e.g., the Marina District of San Francisco) designed in the horse era have very wide streets.

Pretty much any car that's bigger than a subcompact is wider than a horse drawn cart.