Transportation Security: Key Actions Have Been Taken to Enhance Mass Transit and Passenger Rail Security, but Opportunities Exist to Strengthen Federal Strategy and Programs, Report to the Chairman, Committee on Homeland Security, House of Representatives [open pdf - 1MB]
"Terrorist incidents worldwide have highlighted the need for securing mass transit and passenger rail systems. The Department of Homeland Security's (DHS) Transportation Security Administration (TSA) is the primary federal entity responsible for securing these systems. GAO was asked to assess (1) the extent to which federal and industry stakeholders have assessed risks to these systems since 2004, and how TSA has used this information to inform its security strategy; (2) key actions federal and industry stakeholders have taken since 2004 and the extent to which federal actions are consistent with TSA's security strategy, and the challenges TSA faces in implementing them; and (3) TSA's reported status in implementing 9/11 Commission Act provisions for mass transit and passenger rail security. GAO reviewed documents including TSA's mass transit and passenger rail strategic plan, and interviewed federal officials and industry stakeholders from 30 systems and Amtrak--representing 75 percent of U.S. mass transit and passenger rail ridership."
Government Accountability Office: http://www.gao.gov/