Rail Safety: The Federal Railroad Administration Is Better Targeting Safety Risks, but Needs to Assess Results to Determine the Impact of Its Efforts, by Katherine A. Siggerud, director, physical infrastructure issues, before the Subcommittee on Surface Transportation and Merchant Marine Infrastructure, Safety, and Security, Senate Committee on Commerce, Science, and Transportation. GAO-07-841T, May 22.
http://www.gao.gov/cgi-bin/getrpt?GAO-07-841T
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