Traffic and Population Data
Traffic Data Management System (TDMS)
Another major role of SEAGO's Transportation Section is the collection of population data for
growth projections for the region. Population data for Arizona's Counties, Incorporated Places
and Unincorporated Balance of Counties is available below:
July 1, 2017 Population Estimates
July 1, 2015 Population Estimates
July 1, 2014 Population Estimates
Arizona Office of Employment & Population Statistics
(state and county population projections for 2015-2050)
Us Census Bureau National Population Projections (2014-2060).
These projections are the first based on the 2010 Census.
Another valuable resource for state demographics is the Maricopa Association of
Governments' interactive State Demographic Map Viewer.
Highway Performance Monitoring System (HPMS)
Starting with Calendar Year 2018, ADOT assumed the responsibility of collecting all HPMS data
for the state, including HPMS data associated with local government roads. For more information
involving ADOT’s HPMS program please click HERE.
Functional classification is the grouping of highways, roads and streets by the character of service
they provide and was developed for transportation planning purposes. More detailed information
about functional classification be found HERE.
In 2013/2014, SEAGO, along with our member agencies conducted a comprehensive review of the
federal functional classification of all roadways in the region. To view the results of that effort,
please click HERE.
To view the Arizona Department of Transportation’s Functional Classification Maps,
please click HERE: