Rail and other transportation networks in the Northeast that were damaged by Sandy will cost billions of dollars to repair -- and billions more to upgrade to withstand future storms and floods. "Estimates of the damage have reached more than $7 billion," said Sen. Frank Lautenberg, D-N.J. "Across the region, train tunnels, stations and rail yards were flooded, rail tracks were damaged and critical equipment was ruined," he added. "We are facing hundreds of millions of dollars in immediate repair costs and billions more in mitigation and resiliency measures," said Patrick Foye, executive director of the Port Authority of New York and New Jersey.

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