Functional Classification of Highways Functional Classification is the process of grouping streets and highways into classes according to the character of service they are intended to provide.

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  • The Federal Functional Classification System in North Carolina

    The functional classification of roadways defines the role each segment of the roadway network plays in serving travel needs. The NCDOT Transportation Planning Division is responsible for managing and processing updates to this system in North Carolina.

    ​​The functional classes are as follows: Interstate, Other Freeway and Expressway, Other Principal Arterial, Minor Arterial, Major Collector, Minor Collector, and Local Road. Detailed information regarding functional classification is available on the FHWA we​bsite​.  

    The current functional classification for North Carolina may be accessed via:
    • NCDOT GO!NC online mapping platform by searching ‘NCDOT Functional Class’ web map
    • NCDOT GIS Data Layers by downloading the most recent Road Characteristics Geodatabase.
    Transportation Planning Division has Revisio​ns Procedure in place that allows for revision requests to the official functional classification systems as needs arise.

    Questions regarding functional classification should be direct to:
    Hong Qi Lu
    Transportation Planning Division
    1554 Mail Service Center
    Raleigh, NC 27699-1554

Maps from NCDOT.gov

From the NCDOT GIS Unit ArcGIS Maps
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