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ODOT's National Highway System Expansion webpage
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.
 
Informational Webinars
 
ODOT is hosting two webinars for local governments with roads that have been added to the National Highway System under MAP-21. Below is information on the outreach sessions. 
 
The first MAP-21 NHS Design Standard outreach session will be held on Tuesday, April 8th, 1:30-3:00 PM.  Below is the OregonConnect iLinc access code, telephone call in number and passcode to attend the first session.
 
Primary Dial-In: 1-888-850-4523
Passcode: 686781
 
The second ODOT MAP-21 NHS Design Standards outreach session will be held on Thursday, April  10th, 9:00- 10:30 AM.  Below is the OregonConnect iLinc access code, telephone call in number and passcode to attend the second session.
 
Primary Dial-In: 1-888-850-4523
Passcode: 686781
 
For instructions on attending an OregonConnect  iLinc session, review this document.  We suggest that you log into the iLinc ten minutes before the beginning of the outreach session as there may be some delay.
 
Background Information
 
ODOT’s GIS Unit has put together an interactive online map that allows users to see the routes that were added to the NHS.
 
ODOT has compiled a list of local roads and bridges that are now included in the National Highway System.
  
ODOT created a National Highway System Expansion Working Group to work through implications of this change with the Federal Highway Administration and local governments.
 
 
 
 
 
ODOT’s Functional Classification webpage has information on the federal Functional Classification system and the impact of MAP-21.
 
Additional Resources