Structures Design Manual For Highways And Railw...
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This Manual, supplemented by other NJDOT Baseline Documents and operating procedures and policies, is the vehicle by which the design of bridges and structures is implemented. Presented herein is a compilation of NJDOT Structural Design guidance, specification interpretations, standard practices, details and standards.
Bridges and structures are key components of the nation's roadway network that provide transportation connectivity to safely cross features such as waterways, railways, roadways, and other obstacles. The FHWA Office of Bridges and Structures provides national policy and technical guidance related to the design, construction, inspection, evaluation, management, and preservation of the nation's inventory of highway bridges, tunnels, culverts, walls, and other ancillary structures. This is done through regulations published in the Code of Federal Regulations and in supporting policy documents such as memos and technical advisories.
The Office of Bridges and Structures provides a technical function to support the safety, stewardship and oversight of over 610,000 highway bridges, more than 500 tunnels, and numerous other structures across the entire USA. Under the Federal-Aid Highway Program, FHWA annually distributes funding of approximately $7 billion to assist transportation agencies plan, design, build, repair, rehabilitate, and inspect such bridges and structures.
Using the experience and expertise of these teams, the Office provides oversight to the safety and inspection of the nation's highway bridges and tunnels, develops programmatic and technical policy and guidance, reviews designs of complex and unusual projects; provides technical assistance and expertise; keeps related technical resources, training courses and manuals updated; and performs special assignments such as failure investigation.
Structure Design provides statewide design support for MDOT trunkline structure projects. Structure Design delivers plans, specifications, and estimates for structures including bridges, culverts, and other ancillary structures.
The specific standards for vertical clearance adopted for the Interstate System maintain its integrity for national defense purposes. On Interstates, the clear height of structures shall not be less than 16 feet (4.9 meters) over the entire roadway width, including the useable width of shoulder. In urban areas, the 16-foot (4.9-meter) clearance shall apply to at least a single routing. On other urban Interstate routes, the clear height shall not be less than 14 feet (4.3 meters). A design exception is required if this standard is not met. Exceptions on the Interstate must also be coordinated with the Military Surface Deployment and Distribution Command Transportation Engineering Agency of the Department of Defense. 59ce067264