The Federal Highway Administration (FHWA), in conjunction with the Association of State Highway and Transportation Officials (AASHTO) has developed this National Highway Specification website (NHS), to serve the highway construction community and meet the important objectives outlined by the AASHTO Subcommittee on Construction in its Resolution 99-0. This site consists of an electronic library of currently approved standard highway construction specifications and supplemental specifications from state highway agencies and highway-related organizations throughout the United States. It includes the most current approved standard specifications and supplements. Equally important, it contains innovative and emerging special provisions to include warranty and performance-related specifications (PRS), quality assurance (QA) specifications, design-build, and other innovative provisions and reports of interest to the highway construction community. The library uses current state-of-the-art methods to electronically access and search these specifications.

The NHS serves as a clearing house and electronic library where users can search, review, cross-reference, and download the most current specifications and other specification-related documents. The NHS also provides web-based discussion forums for hot topics in areas such as PRS, design-build, warranty specifications, QA, and other innovative special provisions. The NHS provides access to the American Society of Testing and Materials (ASTM) database of most current summaries of ASTM standards, and static links to all specification-related websites currently available on the web.

The documents for each agency in the NHS are organized by category and topic. Users can select specifications either from a single agency under a specific topic area corresponding to the AASHTO guide specification format, or search a particular category across multiple or all agency specifications. This organizational structure will facilitate a wide variety of research needs.

For more specific instructions on how to navigate, access and search the site, please access the help link on this page. If you would like feedback from the FHWA site administrator, please access the feedback link on this page.