Two probability sampling procedures are described which are based on different types of samples-the sample area and the link-day-and pilot studies which utilized these procedures are reviewed. In the area sampling procedure, the state is divided into areas each containing about 50 miles of local rural roads. Two sample areas are randomly selected for each week within the year, and counters are set out for a one week period at every fifth milepoint on the roads. With this procedure it is possible to select the same area more than once but for different weeks of the year. The link-day statistical procedure is based upon a sampling of 24-hour volume counts on city streets. The design involves stratified random sampling utilizing the link-day as the basic sampling unit. A link in a street system is considered to be one street intercepted by two other streets. Area sampling pilot projects conducted in Colorado and Oregon are described and the details are outlined of link-day pilot sampling projects in Wisconsin and Idaho. Areas in the design which need improvements are noted. A detailed description of the two sampling procedures are appended.

  • Corporate Authors:

    Federal Highway Administration

    Office of Highway Planning, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Bodle, R R
  • Publication Date: 1973-7

Media Info

  • Features: Appendices; Tables;
  • Pagination: 36 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00135045
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: Aug 11 1976 12:00AM