"The fundamental challenge to securing the freight rail network is to protect against a constantly changing, unpredictable threat environment without impeding the continuous movement and free flow of commerce. While there is no specific threat or intelligence points to freight rail transportation, the potential exists for using the freight rail system as a target for terrorism or as a delivery system for a weapon of mass effect. The efficient operation of our critical interstate freight rail network requires a uniform nationwide approach to railroad security. The Department of Homeland Security (DHS) will continue to work with its private sector, and Federal, State, and local partners to achieve the transportation sector goals outlined in this document. The freight rail mode will continue to apply the National Infrastructure Protection Plan (NIPP) risk management framework for developing programs and initiatives to enhance the protection of Critical Infrastructure and Key Resources (CI/KR). As outlined in chapter 1 of the Transportation Sector-Specific Plan (TSSP), the transportation sector identified three goals to help achieve the sector vision of a "secure, resilient and efficient transportation network." The freight rail mode will focus on these goals when identifying key assets and will evaluate consequence, vulnerability, and threat information to adequately assess risks facing the system. Initial security gaps have been identified, and security programs have been developed and implemented to mitigate these risks. The government continuously evaluates security gaps in freight rail, as in all modes. Mitigation strategies are updated as gaps are identified."
Dept. of Homeland Security: http://www.dhs.gov/