Government Relations ODOT's National Highway System Expansion webpage

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Government Relations

ODOT's National Highway System Expansion webpage
Article Content MAP-21 attempts to standardize the National Highway System (NHS) across states by expanding the NHS to include urban and rural principal arterials, the main thoroughfares that carry most traffic. This expansion added approximately 600 miles of routes to the NHS in Oregon as of October 1, 2012. About three quarters of the new NHS miles are on state highways operated by ODOT, while about one quarter are on local roads. ODOT’s GIS Unit has put together an interactive online map that allows users to see the routes that were added to the NHS. NHS Impact Analysis Map Tool ODOT has compiled a list of local roads and bridges that are now included in the National Highway System. NHS local roads in Oregon NHS local bridges in Oregon ODOT created a National Highway System Expansion Working Group to work through implications of this change with the Federal Highway Administration and local governments. Report of the NHS Expansion Working Group NHS Design Standards for ODOT and Local Agencies ODOT’s Functional Classification webpage has information on the federal Functional Classification system and the impact of MAP-21. ODOT Federal Functional Classification Additional resources: FHWA Frequently Asked Questions about NHS Expansion FHWA National Highway System maps and memo about expansion

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