That’s a part of it as well. If you make roads visibly narrow, with nearby obstacles, not a lot of people would feel comfortable speeding down that street, even if they were inclined to speed. Example:

Whereas in America, suburban “neighborhoods” have extremely wide streets with houses at extreme setbacks in an attempt to limit the danger to… cars, I guess, for their reckless driving. Everything about them screams “you can drive whatever speed you want, you won’t be hitting anything”. Example: