Axle and Length Classification Factor Analysis and Effects on Annual Average Daily Traffic (AADT)

Project objectives are as follows: (1) Assemble State Departments of Transportation (DOTs) and industry experts to conduct research and statistical analysis on millions of traffic data records in order to provide guidance and understanding on the variability of how axle and length classification data affect Annual Average Daily Traffic (AADT), specifically with regard to the creation of axle factors. (2) Gain a quantitative understanding on how length classification traffic data affects the calculation of AADT. Length classification sites are more cost effective than axle classification sites from installation to maintenance. This objective will allow DOTs to fully understand the statistical significance and soundness when using this cost-effective data collection option. (3) Gain a quantitative understanding of how axle and length classification traffic data interact and affect the calculation of AADT. State DOTs that have both these types of continuous classification traffic site installations or State DOTs who are considering including the lesser expensive length classification sites to their continuous program will understand advantages and distinctions of utilizing these combined data sources. Organizational Structure is as follows: TECHNICAL COMMITTEE - State Department of Transportation Agencies Lead State - Wisconsin DOT: (1) Agency proposing the pooled fund; (2) Act as the sponsoring agency; (3) Receive invoices from the selected vendor; and (4) Assist in soliciting new pooled fund partners. Participating States: (1) Review, comment on, and recommend for approval all project proposals generated through their participation on the Technical Committee; (2) Make final decisions of the approval of any project proposal; Participating states, including the lead state, will have one vote on the Technical Committee. Selected Vendor will: (1) Prepare invoices to be sent to Wisconsin DOT for research activities; (2) Plan, coordinate, and facilitate meetings of the Technical Committee using teleconferencing and other available technologies, as well as face-to-face meetings; (3) Prepare draft proposals that include work plans and budgets to be presented to the Technical Committee for review, comment, and approval; and (4) Prepare quarterly reports to be submitted to the Technical Committee and the Wisconsin DOT.


  • English


  • Status: Completed
  • Funding: $262500
  • Contract Numbers:


  • Sponsor Organizations:

    Georgia Department of Transportation

    600 West Peachtree Rd
    Atlanta, GA  United States  30308

    Idaho Department of Transportation

    P.O. Box 7129
    3311 W. State Street
    Boise, ID  United States  83707-1129

    Illinois Department of Transportation

    2300 S. Dirksen Parkway
    Springfield, IL  United States  62764

    Iowa Department of Transportation

    800 Lincoln Way
    Ames, IA  United States  50010

    Kansas Department of Transportation

    Eisenhower State Office Building
    700 SW Harrison Street
    Topeka, KS  United States  66603-3754

    Minnesota Department of Transportation

    Transportation Building
    395 John Ireland Boulevard
    St Paul, MN  United States  55155

    North Dakota Department of Transportation

    608 East Boulevard Avenue
    Bismarck, ND  United States  58505-0700

    Ohio Department of Transportation

    Research Program
    1980 West Broad Street
    Columbus, OH  United States  43223

    Pennsylvania Department of Transportation

    Keystone Building
    400 North Street
    Harrisburg, PA  United States  17120

    Texas Department of Transportation

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

    Utah Department of Transportation

    4501 South 2700 West
    Project Development
    Salt Lake City, UT  United States  84114-8380

    Wisconsin Department of Transportation

    PO Box 7910
    4802 Sheboygan Avenue, Room 104
    Madison, WI  United States  53707-7910

    New York State Department of Transportation

    50 Wolf Road
    Albany, NY  United States  12232
  • Project Managers:

    Severson, Ethan

  • Start Date: 20211013
  • Expected Completion Date: 0
  • Actual Completion Date: 20190607
  • Source Data: RiP Project 42256

Subject/Index Terms

Filing Info

  • Accession Number: 01590709
  • Record Type: Research project
  • Source Agency: Federal Highway Administration
  • Contract Numbers: TPF-5(340)
  • Created Date: Feb 22 2016 11:59AM