After eight years of neglect by Gov. Ed Rendell, it's a wonder none of Pennsylvania's deteriorating bridges have yet to collapse.

From a new report, "The Fix We're In For: The State of the Nation's Bridges," which ranks states in terms of the overall condition of the state's bridges:

The five states with the worst bridge conditions have over 20 percent structurally deficient bridges: Pennsylvania has the largest share of deteriorating bridges at 26.5 percent, followed by Oklahoma (22.0%), Iowa (21.7%), Rhode Island (21.6%), and South Dakota (20.3%).

New Report Highlights Mounting Challenge of Aging Bridges