Functional Classification reference chart
Use this chart to determine the road type for Pennsylvania roads based on the functional class.
First, find the functional class of the road in the MPMS IQ map in the operational layers and determine if it is a signed, numbered highway in one of the highway systems.
Follow the column for the road's highway system down to the row for the road's functional class to find the proper road type for that particular road.
The PennDOT color coding is cross-referenced in the first column of the table for your convenience.
|Interstate||Interstate Business, Loop, Spur||US Hwy (incl. some special routes)||US Hwy BUS, SPUR, LOOP||State Route Shielded||State Route Unshielded||Locally Maintained|
|Examples||I-80||I-94 Business||US-190||US-460 Business||SR-23 SR-309||SR-2006||Roberts St|
|Other Principal Arterial||n/a|
|Urban or Rural-Major Collector||n/a|
|Rural Minor Collector||n/a||[b]
| Local Roads or
^b Some 4-digit State Routes are numbered for legacy or maintenance reasons, but they do not serve as primary thoroughfares for the area and should be classified as .
^c These two categories were changed from to per PA Forum discussion November 2017.