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MAP 21 and Enhanced NHS System
Moving Ahead for Progress in the 21st Century (MAP-21) is the latest Transportation bill and was signed into law on July 6, 2012.
Among the many changes in MAP-21, is a new definition of the National Highway System (NHS). As of October 1st, 2012, the NHS was automatically expanded to include all roads that had both a federal functional classification (FC) of principal arterial, and connected to an existing or new NHS route on at least one end.
Oregon Impact:  About 600 miles of principal arterials—including many local roads—were added to the NHS.  These routes are now subject to AASHTO design standards as the result of this designation. In addition, a number of new federal performance measures are required on all NHS.  Local governments may want to consider reviewing FC designation of some marginal principal arterial routes.  ODOT continues to work with FHWA to refine Oregon’s NHS network. .
FHWA’s Question and Answer web pages are being updated regularly and can be found here: http://www.fhwa.dot.gov/map21/qandas/qanhs.cfm 
  • Where are the new additions of PA’s to NHS? FHWA published a map of the new NHS segments on October 1. The majority of Oregon’s Principal Arterials (approximately 600 miles) were added to the NHS. This impacted both State Highways and roads owned by Local Agencies. To see which roads were added to the NHS system, ODOT has created a GIS application that shows the current NHS system.
o       NHS Impact Analysis Map Tool (under construction) 
o       Digital Video Log (To view NHS roads, under “Road Type”, uncheck “Highways” and check “Other”)
  • Can Agencies change the Functional Classification of their roads? Yes. Requests for a change to the Federal FC can be made at any time by filling out the change request form found at the link below. However, please note that updated FHWA FC guidance is pending.
  • What happens if an agency wants to change a principal arterial that was added to the NHS after October 1st? The processes to change functional classification and/or NHS have not changed. To begin a change request, fill out the form at the link below. ODOT staff will contact you and help you walk through the process. Keep in mind that the change in functional classification must be justified based on federal FC guidelines. Changes to NHS requires additional justification.  FHWA guidance is pending. However this should not delay the approval of any changes.
  • Will adding a principal arterial after October 1st mean the road will automatically be added to the NHS? No. Only the principal arterials that were designated as such on October 1st were added to the NHS. A separate approval process is required to make changes to the NHS system.
Federal Functional Classification Change Request
To request a change to the Federal Functional Classification of a road, please fill out one of the following forms and submit to Charles McConnell at the contact info below.
Charles ‘B’ McConnell, Sr. Classification Specialist – (503)986-4386
Jennifer Campbell, HPMS Coordinator – (503)986-4149
Heather King, RICS Unit Manager – (503)986-4157
Mail to:
555 13th St NE, Suite 2
Salem, OR 97301