Minnesota Department of Transportation
To gather information about state DOT traffic forecasting practices used to project traffic volumes in nonmetropolitan areas with a population under 50,000, CTC & Associates distributed a brief online survey to members of the AASHTO Standing Committee on Planning. The survey of current practice summarizes the 30 responses to the survey. Most survey respondents use linear regression models to estimate future traffic volumes. Socioeconomic variables are widely used by survey respondents when forecasting future traffic volumes, with data on total population, employment and households most frequently cited by respondents. The most frequently cited time period used in projecting traffic volumes is 20 years.
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