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The Rail ParkPhiladelphia Groundbreaking:not scheduled

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Will transform a 1.5-mile track in hopes of revitalizing communities in North St. Louis.

Three-mile trail will connect five parks, and two new ones will also be created.

Will produce 1,300 acres of new and improved green space and 5,600 units of affordable housing.

The Trestle St. LouisProjected ground-breaking 2016

Attracts 750,000-plusvisitors a year and brings an estimated $21 million in revenue to the local economy.

The 606 ChicagoGround breaking 2013

BeltLine AtlantaFirst segment opened: 20 TK

Brought in more than $2 billion of develop-ments. Nearby prop-erty values rose 103% per square foot.

Walkway Over the Hudson State Historic Park Poughkeepsie, NYOpened: 2009

The High Line New YorkFirst segmentopened: 2009

Thirty-two percent of the land in the area is vacant. The city will rezone 70 acres to permit a mix of residential and light industrial use.