National resources/Functional classification

Functional classification is a system by which roads are classified using a set of criteria selected by the Federal Highway Administration (FHWA). These criteria include not only the physical attributes of the road but also efficiency of travel, number of access points, speed limits, route spacing, actual usage, and continuity. This can lead to quite different classifications for roads that appear similar. For example, a six-lane divided road in an urbanized area may be a Collector (Primary Street); a two-lane road through the middle of a town may be a principal arterial (Major Highway).

In Waze, functional classification is used to determine road type in the United States.

Functional classification is a national standard, but functional classification maps are published by state departments of transportation. Links to functional classification maps for each state can be found in the table below.

Reason for changes

The Waze forum holds a lengthy discussion on why the Functional Classification changes are being made.

Functional classification maps by state

State	Interactive map	Static maps	Notes
Alabama		ALDOT
Alaska	Alaska DOT
Arizona		ADOT
Arkansas	ArcGIS Viewer		AHTD FC Overlay for ArcGIS - To use the overlay, click on the "Modify Map" in the upper right corner of ArcGIS. On the left side an "Add+" tab will pop up. Click on it and select "Add Layer from Web" and paste in this URL:  http://gis.arkansas.gov/arcgis/rest/services/FEATURESERVICES/Transportation/MapServer/8
California	Caltrans Earth	Caltrans	Caltrans Earth is down, for the foreseeable future. Please use the Static maps. :(
Colorado	CDOT MapView
Connecticut		Connecticut DOT
Delaware		DelDOT
District of Columbia		DDOT
Florida	FDOT's Downloadable GIS files	See Southeast Region Wiki	Please DO NOT use the FDOT Enterprise IMAP for doing Functional Classification Changes. It is out of date.
Georgia	Georgia DOT	Atlanta Metro	Note that these maps are years out of date. Confer with the Waze State Manager before making large changes.
Hawaii	Hawaii DOT		The updated HDOT GIS Website requires the Adobe SVG Viewer.
Idaho	ArcGIS Webmap
Illinois	Getting Around Illinois	Illinois DOT	If interactive and static map disagree, use the interactive map classification and please notify Illinois SM's of the road and map in error.
Indiana	INDOT FC Layer
Iowa		IowaDOT
Kansas		KDOT
Kentucky	KYTC Functional Class	Kentucky Transportation Cabinet
Louisiana	LaDOTD Interactive Online Map	LaDOTD
Maine	MaineDOT	MaineDOT
Maryland	MD SHA via nzahn1	MD SHA	Interactive Maps transformed from MD SHA data to Google Earth(.kml) by nzahn1
Massachusetts	Road Inventory Map	massDOT	Select Federal Functional Classification from pulldown list on Road Inventory Map.
Michigan	MDOT PR Finder	MDOT
Minnesota	MnDOT Basemap	MnDOT
Mississippi		MDOT
Missouri		MoDOT
Montana	ArcGIS Webmap	MDT Statewide PDF
Nebraska		Nebraska Department of Roads
Nevada		Nevada DOT
New Hampshire		New Hampshire DOT
New Jersey		NJDOT
New Mexico	NMDOT	NMDOT
New York	NY State DOT FC Viewer
North Carolina	NCDOT
North Dakota		NDDOT
Ohio	TIMS	Ohio DOT
Oklahoma	ODOT ArcGIS	ODOT
Oregon	ODOT TransGIS	ODOT
Pennsylvania	PennDOT MPMSIQ	PennDOT	In the MPMSIQ map, use the operational > FC layer. <br\>Information in the older static maps is out of date.
Rhode Island		RI Division of Planning
South Carolina		SCDOT GIS/Mapping
South Dakota		SDDOT
Tennessee		TDOT
Texas	TxDOT Statewide Planning Map
Utah	UDOT
Vermont		VTrans
Virginia		VDOT
Washington	WSDOT
West Virginia		WV DOT
Wisconsin		WisDOT
Wyoming		WYDOT	Appears on U.S. Forest Service - WYDOT Liaison Program Other urban FC maps appear on various WY city government pages