'Suburb' is a tricky word, with meanings that vary from 'residential neighborhood' to 'cul-de-sacs and freeways'. But most pre-WWII cities do have a belt of rai

'Suburb' is a tricky word, with meanings that vary from 'residential neighborhood' to 'cul-de-sacs and freeways'. But most pre-WWII cities do have a belt of railroad/streetcar suburbs to which many of these lessons would apply, though they might need new rail service to truly act on them— Pasadena, Palo Alto, Lakewood, Shaker Heights, Wauwatosa, Columbia Heights, Beaverton, Edmonds, Englewood CO, etc. Places like this are easy to identify— they're basically anywhere outside city limits where the streets are laid out on a regular grid. Places like this in growing cities will probably see a lot of development pressure in the coming decades, as young people who desire urban living but who are unable or unwilling to deal with American urban problems seek them out. And many of them were originally built out in 20 years, from 1910-1930, so if zoning is right they could once again rapidly urbanize.