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|National Highway System (NHS) Maps|
Important Revision Information: The maps accessible from this page will not be updated with the
latest FHWA approved revisions. For any NHS revisions approved after April 22, 2015, refer to the MDOT
NFC web mapping application at http://www.mcgi.state.mi.us/nfc/
and click on the
The PDF maps accessed from this page will not be updated until the statewide NFC review completes sometime in 2016 and FHWA has reached a decision on proposed NHS revisions.
Questions on NHS or NFC can be submitted to: firstname.lastname@example.org
The National Highway System (NHS) was established on November 28, 1995, through the National Highway System Designation Act of 1995; the system was expanded when the Transportation Equity Act for the 21st Century was adopted on June 9, 1998. On October 1, 2012, the Moving Ahead for Progress in the 21st Century Act (MAP-21) went into effect which further expanded the National Highway System. MAP-21 added all other principal arterials not previously included in the NHS. The original intent of the National Highway System as taken from the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA), Section 1006 was to:
Provide an interconnected system of principal arterial routes which will serve major population centers, international border crossings, ports, airports, public transportation facilities, and other intermodal transportation facilities and other major travel destinations; meet national defense requirements; and serve interstate and interregional travel."-- Federal guidelines for the selection process include a functional classification requirement.
Here are the sub-systems of roadways that make up the National Highway System as taken from the FHWA National Highway System website.
Mileage Information: This route mileage is from the 2013 Highway Performance Monitoring System (HPMS) report, this is the latest information as of April 22, 2015. Michigan has roughly 6,428 miles in the National Highway System of roads. MDOT has jurisdiction on 5,227 of the NHS route miles, other local transportation agencies have jurisdiction over the remaining 1,201 route miles. Not all NHS roads are under MDOT jurisdiction and not all MDOT routes are NHS.
Note: A county NHS map was produced for all counties, although some counties do not contain any NHS roads in them.
These maps require Adobe Acrobat Reader for viewing, if you experience a pdf error opening the file and are using IE v11, try a different browser. The pdf map geography shown is from version 12 (2012) of the Michigan Geographic Framework (MGF) updated to show the enhanced MAP-21 NHS. As of April 22, 2015, no revisions to the NHS have been approved by FHWA since these maps were created.