Functional Classification Map Update

After each U.S. Census ODOT, in coordination with NOACA, updates the functional classification of roadways. This is done to reflect changes in expanded urban areas and changing traffic patterns.

• The Functional Classification System is used to identify roads, streets, and highways that are eligible for federal funds. To qualify for federal funds, a facility must be classified higher than a local road on the urban system and higher than a local road or minor collector on the rural system. (Some rural minor collectors have limited eligibility for federal aid.)
• Functional classification is used as a management tool in transportation planning. ODOT uses functional classification as one measure of a route’s transportation importance and efficiency in project selection and program management. ODOT also uses functional classification to determine maintenance allocations and data collection needs, and to set design criteria for various roadway features such as lane and shoulder widths, horizontal and vertical clearances and design speeds.
  
• In general, federal-aid may be used only on streets/highways that functionally classified higher than a local road on the urban system or higher than a local road or minor collector on the rural system.