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Annual Traffic Count Program

Pima Association of Governments, along with some of its member jurisdictions, regularly collect traffic counts on major roads and intersections throughout the region. In addition to being a vital input to PAG’s transportation planning and travel forecasting, traffic count information is used by:
 
  • transportation engineers and planners throughout the region to identify existing traffic problems and solutions
  • the Arizona State Legislature and U.S. Congress to make decisions regarding the need for and allocation of state and federal funds
  • regional, state and federal air quality experts to monitor traffic related pollutants and conformance with air quality standards
  • private sector marketing specialists as measures of accessibility and exposure 
To maximize the value of this data, PAG annually compiles and distributes all of the traffic counts collected throughout eastern Pima County. These data are available in a number of formats, including: 
  • PAG’s annual traffic volumes map, a large (25x40 inch) display of recent 24-hour weekday traffic counts on major roads in the Tucson region. (See link at right). Poster-size printed copies of the most recent map are available at the PAG office. Historical maps going back as far as 1942 can also be viewed online.
  • PAG’s annual traffic count report listing the most recent traffic counts on major roads in the  Tucson Region. (See link at right).
 

Methodology

PAG collects weekday traffic count data for selected regionally significant roadway segments within the Tucson metropolitan area. PAG’s traffic count data is collected by a consultant firm, usually on a Tuesday, Wednesday or Thursday in February, March or April. Typical traffic data collection methods involve the placement of pneumatic tubes connected to recording devices at selected locations along roadway segments for a period of at least 48 contiguous hours. 
 
PAG’s goal is to collect a representative traffic count for each roadway segment. However, counting devices can and sometimes do malfunction, resulting in erroneous results. Nearby roadway construction, traffic accidents and other unknown incidents can significantly affect traffic and result in non-typical counts. Even without specific incidents, traffic counts can vary significantly at different locations within a given segment and from day-to-day, month-to-month and throughout the year. 
 

Traffic Volumes Maps

Free hard copies are available for pickup at Pima Association of Governments (limit 5 free, subject to availability)

2012 Traffic Volumes Map (Current)

Historic ADT Maps

Interactive Traffic Count Map

Traffic Count Report

Traffic Volume Forecasts

Resources

Additional traffic count data are available from:

 

 

 

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