Multimodal Planning Division

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Functional Classification

The 1991 Intermodal Surface Transportation Act required each state to functionally reclassify its public roads and streets; ADOT was assigned to lead Arizona's effort. ADOT undertook the task of coordinating with federal, state and local jurisdictions in order to functionally classify Arizona's public roads and streets. Additional information about the Functional Classification process can be found in the following documents:

Process for Modifying Routes on Arizona's Functional Classification System
Arizona Functional Classification Guidelines
Worksheet for submitting a Reclassification Request
FHWA Guidelines
From the March 1989 FHWA report "Highway Functional Classification: Concepts, Criteria and Procedures"
Updated Functional Classification Maps ~ Approved March 2005
Approved Urban Area boundary maps
"Smoothed" maps based on the 2000 Census

Documents are posted as they become available in PDF format, which requires Adobe Reader to view.