"The purpose of the 2015 Transportation Systems Sector-Specific Plan (TS SSP) is to guide and integrate efforts to secure and strengthen the resilience of transportation infrastructure and to describe how the Transportation Systems Sector (hereafter referred to as the Sector) contributes to the overall security and resilience of the Nation's critical infrastructure, as set forth in Presidential Policy Directive 21 (PPD-21), 'Critical Infrastructure Security and Resilience'. The TS SSP tailors the strategic guidance provided in the National Infrastructure Protection Plan 2013, 'Partnering for Critical Infrastructure Security and Resilience' (NIPP 2013), to the unique operating conditions and risk landscape of the Nation's varied transportation systems. The TS SSP represents a collaborative effort among Federal departments and agencies; State, local, tribal, and territorial (SLTT) governments; non-governmental organizations; and public and private critical infrastructure owners and operators to achieve shared goals and priorities to reduce critical infrastructure risks. It also reflects the maturation of the Sector partnership and the progress made by the Sector since the 2010 TS SSP to address evolving risks as well as operating and policy environments. This Plan describes an approach to manage security and resilience efforts while enhancing the efficient use of the capabilities and resources of the Sector's government and industry partners. Transportation systems encompass diverse and interconnected networks of fixed and mobile assets that provide essential services for the Nation's livelihood and economic prosperity."
Department of Homeland Security: http://www.dhs.gov/