[20181005]IF10995_联邦政府在铁路桥梁安全中的作用.pdf

https:/crsreports.congress.gov October 5, 2018The Federal Role in Railroad Bridge SafetyRailroad bridges carry heavy and potentially dangerous loads over busy roadways and important waterways. Many of these bridges are a century old or more. For example, the Metropolis and Sciotoville bridges over the Ohio River, owned and maintained by freight railroads BNSF and CSX, respectively, were built in 1917. Near Baltimore, CSX freight trains and MARC commuter trains use a stone arch bridge built in 1835. These bridges, built to conservative standards in the age of heavy steam locomotives, have proven to be durably engineered, and rail accidents resulting from bridge failure have been rare. Nevertheless, the presence of visibly aging infrastructure can be alarming to residents, especially in the aftermath of the rare incidents where bridges do fail. For example, on July 5, 2018, two 30-ton pieces of non-load-bearing concrete fell from the Onondaga Street Bridge, owned by the New York, Susquehanna & Western Railway (NYSW), in Syracuse, NY; no one was hurt. In a separate incident in 2012, a Conrail train derailed and a tank car carrying hazardous materials was punctured while crossing a mo