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Expanded National Highway System (NHS)

The District Expanded NHS Maps below show the original NHS as well as the routes that were added to the NHS due to MAP-21 (Expanded NHS) for each District including Local routes. In the right column is a wall size statewide map of the new expanded NHS and 2 excel files, one for the state routes and one for the Local routes, that identify the locations by county route section including jurisdiction.

To learn more about MAP-21, download the following PDF file:

Implications of Expanding the National Highway System


 District Expanded NHS Maps




‚ÄčMatt Thompson
GIMs Specialist
Transportation Information Management
(614) 466-3108


 Large Map File of Ohio


 Expanded NHS Excel Files