GAO Report on Railroad Bridges and Tunnels
Railroad Bridges and Tunnels: Federal Role in Providing Safety Oversight and Freight Infrastructure Investment Could Be Better Targeted, GAO-07-770, August 6, 2007. “Freight railroads account for over 40 percent (by weight) of the nation’s freight on a privately owned network that was largely built almost 100 years ago and includes over 76,000 railroad bridges and …