Congested and unfriendly to pedestrians, Albany Avenue in Hartford, Conn., is an example of long-term, cumulative effects of zoning. Zoning codes set the rules for where things can (or can’t) be built ...

Restrictive zoning codes limit the housing supply and contribute to segregation, but the nuances of how and where this happens can be hard to nail down. Now, new datasets and maps are shining a light ...