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Map: Where we live now — 2010 household density and priority development areas

Part of the challenge facing regional planners, who wrote the 30-year Plan Bay Area, is that it is hard to predict future population growth. The current list of more than 200 potential priority development areas in the plan tracks established high-density zones closely, indicating that the Association of Bay Area Governments, the Metropolitan Transportation Commission and other regional agencies want to fill in developments in areas that are already highly urbanized or near mass transit lines, instead of in undeveloped or underdeveloped suburban settings.  Read more