Table 3 MDOT National Functional Classification (NFC) code road classes
From: Evaluating Michigan's community hospital access: spatial methods for decision support
1 – Rural Interstate (principal arterial) | 11 – Urban Interstate (principal arterial) |
2 – Rural Other Principal Arterial (non-freeway) | 12 – Urban Other Freeway (principal arterial) |
5 – Rural Other Freeway (principal arterial) | 14 – Urban Other Principal Arterial (non-freeway) |
6 – Rural Minor Arterial | 16 – Urban Minor Arterial |
7 – Rural Major Collector | 17 – Urban Collector |
8 – Rural Minor Collector | 19 – Urban Local |
9 – Rural Local | 0 or uncoded – not a certified public road |