Spurred by several near-disasters and partial collapses, Pennsylvania officials are pulling out all the stops to fix their state's crumbling bridges. With 5,600 bridges still rated as structurally deficient, however, experts say that an additional $3.5 billion a year is needed to get the state's transport infrastructure in shape. "We're on afterburners right now with our bridge team," says one engineer. "The problem is, the state and federal governments are on their reserve tanks."

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