While spreading development around metropolitan areas, such as Washington, D.C. may be inevitable, the way it happens, as in this case, hardly benefits the folks who already live there.
Who is going to pay for the new schools, sewers, and other infrastructure that such development will require. Not likely the "deep pocket" who threaten law suits if they don't get their way. While impact fees have successfully made developers pay their fair share of costs (which they pass on in the prices of their houses)in other places, this is generally not true in Pennsylvania. Small municipalities, such as Liberty Township, are no match for the well-heeled, legal-staffed developers.
Thanks to Shirley Loveless
FULL STORY: D.C. Sprawl Crosses Into A New State: Pennsylvania

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Planetizen Federal Action Tracker
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Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Gallatin County Department of Planning & Community Development
Heyer Gruel & Associates PA
JM Goldson LLC
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
Jefferson Parish Government
Camden Redevelopment Agency
City of Claremont