Assessing Roadway Traffic Count Duration and Frequency Impacts on AADT Estimations

The objectives of this research project are to gain a quantitative understanding on: (1) How various short term traffic count durations affect and relate to estimated annual average daily traffic (AADT) as compared with long term continuous counting program estimations. The ultimate goal is to enable the Federal Highway Administration (FHWA) to provide the most feasible and technically sound guidance to States and other agencies on this issue. (2) How missing data from long term traffic monitoring data affects the AADT estimation and establish the critical threshold in terms of data usability. In other words, how much data can be missing and what type of data patterns missing can be tolerated in AADT estimation without any special consideration such these steps used in converting short term counts to AADT. (3) Traffic monitoring methods from a given segment on an annual basis with a 24 hour traffic count program (counted on a frequency of every year) vs. monitoring the same segment on a once every three year (with every 2nd and 3rd year factored to bring them to current year) basis but with a minimum 48 or 72 hour hour count and how these three different methods can effect AADT data on an annual basis.

• Record URL:
  http://www.pooledfund.org/Details/Study/534

Language

• English

Project

• Status: Completed
• Funding: $308000
• Contract Numbers:

  TPF-5(292)

• Sponsor Organizations:

  Alaska Department of Transportation and Public Facilities

  Research & Technology Transfer
  2301 Peger Road
  Fairbanks, AK  United States  99709-5399

  Wisconsin Department of Transportation

  4802 Sheboygan Avenue
  Madison, WI  United States  53707

  Texas Department of Transportation

  125 E. 11th Street
  Austin, TX  United States  78701-2483

  Pennsylvania Department of Transportation

  Keystone Building
  400 North Street
  Harrisburg, PA  United States  17120

  Minnesota Department of Transportation

  395 John Ireland Boulevard
  St Paul, MN  United States  55155

  Illinois Department of Transportation

  2300 S. Dirksen Parkway
  Springfield, IL  United States  62764

  Georgia Department of Transportation

  No. 2 Capitol Sqaure
  Atlanta, GA  United States  30334-1002

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Jessberger, Steven

• Start Date: 20131121
• Expected Completion Date: 0
• Actual Completion Date: 0
• Source Data: RiP Project 35747

Subject/Index Terms

• TRT Terms: Annual average daily traffic; Data quality; Time duration; Traffic counts; Traffic data; Traffic estimation; Traffic surveillance
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 01573308
• Record Type: Research project
• Source Agency: Federal Highway Administration
• Contract Numbers: TPF-5(292)
• Files: RIP, USDOT, STATEDOT
• Created Date: Aug 22 2015 1:00AM