Some cities manage fine with very small roads. Sometimes there isn’t exactly a road at all, but rather a pedestrian area that can be used for deliveries and such when necessary.

American city centers are overprovisioned on roads by probably a factor of 10 or more. Ironically, fixing that would be excellent for local businesses, and they’re usually the ones opposing it because they think there’s no way to get customers besides having them drive directly to the business and park on their property.