I read this as a suggestion for cities to adopt more R2 zoning. I heard an architect once say that a city will only grow as large as it takes for a person to t

I read this as a suggestion for cities to adopt more R2 zoning. I heard an architect once say that a city will only grow as large as it takes for a person to travel from one end to city to the other within an hour. Perhaps rapid transit solutions could create more affordable housing on the outskirts of any given city?