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Our mission is to protect the nation's transportation system--a complex 'system of systems' comprised of aircraft, ships, and rail and motor vehicles; airports, seaports, and transshipment facilities; roads, railways, bridges, and pipelines; and supporting infrastructures--from terrorist attack and criminal activity. We have made it our responsibility to understand the magnitude of such pursuit, and maintain a heightened sense of urgency in all of our security operations. Americans depend on us and will continue to do so into the future. As we work to meet the immediate needs of the transportation sector, we continue to develop and implement the strategies that enable us to perform our daily activities while ultimately preparing us for the future. Accordingly, we have prepared a five-year strategic plan focused on four fundamental goals: (1) Domain Awareness, (2) Prevent and Protect, (3) Respond and Restore, and (4) Organizational Effectiveness.
This document sets forth the national policy agenda developed by the Department of Transportation to fulfill both short- and long-term transportation needs as the Nation prepares to meet future challenges and opportunities. This agenda revolves around six key themes: (1) Maintain and expand the Nation's transportation system; (2) Foster a sound financial base for transportation; (3) Keep the transportation industry strong and competitive; (4) Ensure that the transportation system supports public safety and national security; (5) Protect the environment and the quality of life; and (6) Advance U.S. transportation technology and expertise for the 21st century. This document expands upon these objectives and outlines the strategies and actions necessary to accomplish them.
Up-to-date coverage of bridge design and analysis revised to reflect the fifth edition of the AASHTO LRFD specifications Design of Highway Bridges, Third Edition offers detailed coverage of engineering basics for the design of short- and medium-span bridges. Revised to conform with the latest fifth edition of the American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications, it is an excellent engineering resource for both professionals and students. This updated edition has been reorganized throughout, spreading the material into twenty shorter, more focused chapters that make information even easier to find and navigate. It also features: Expanded coverage of computer modeling, calibration of service limit states, rigid method system analysis, and concrete shear Information on key bridge types, selection principles, and aesthetic issues Dozens of worked problems that allow techniques to be applied to real-world problems and design specifications A new color insert of bridge photographs, including examples of historical and aesthetic significance New coverage of the "green" aspects of recycled steel Selected references for further study From gaining a quick familiarity with the AASHTO LRFD specifications to seeking broader guidance on highway bridge design Design of Highway Bridges is the one-stop, ready reference that puts information at your fingertips, while also serving as an excellent study guide and reference for the U.S. Professional Engineering Examination.
Provided is an overview of the Nation's transportation system which identifies future investments required to maintain and develop its infrastructure. The contents of this study were used in support of the National Transportation Policy Statement, issued by the Department of Transportation during March 1990. It is organized around a framework in which transportation is viewed as an integral part of our socioeconomic system. The future development of transportation will be influenced by the same factors affecting the rest of the system, namely, demographic changes, the future course of the economy, the energy supply, and preservation of the environment.