Or more specifically, are there any towns out there that have gone all-in on this mindset? For example, there's lot of housing developers out there that build

Or more specifically, are there any towns out there that have gone all-in on this mindset? For example, there's lot of housing developers out there that build "eco-villages" housing developments -- the houses have solar or are well-insulated or there's a community garden or something else cute like that. But a real "eco village" isn't a housing development with a gate or two onto the local stroad, it's a walkable/bikable/mixed-development town where you don't need a car to go grab a cup of coffee. Outside of the old pre-car suburbs like Cambridge/Somerville, are there any towns that are actively all-in on these ideas?