A project to identify and evaluate areawide traffic performance and evaluation measures was undertaken. The first phase involved gathering information on traffic performance measures and data collection techniques. Questionnaire preparation and distribution made up the second phase. The final phase was an informational report. It was found that while many measures of effectiveness have been developed few are used. Ease and cost of data collection seem to be deciding factors in what measure will be utilized. Measures of accident reduction, travel and delay time reductions and traffic volume are the most prevalent and easily obtained, more subtle measures were least cost effective. While few areawide traffic improvement projects have been completed to date, computerized signal systems, with built in evaluation systems, may lead to an increase. Instrumented collection of traffic data has increased some but the old methods continue to be used most of the time. Before and after studies of accident rates continues to be valuable. Costs of evaluation studies are more for higher construction costs but evaluation costs, as a percent of construction costs, decrease as contruction costs increase. State traffic departments, state planners, local agencies and consultants have been used in the evaluation in different states; each one's perspective is useful. For any evaluation procedure there are pros and cons, but it seems that those most often used for evaluation of spot and arterial improvements will continue to be used for areawide projects.

  • Supplemental Notes:
    • Report of Technical Committee 4H-M.
  • Corporate Authors:

    Institute of Traffic Engineers

    2029 K Street, NW
    Washington, DC    20006
  • Publication Date: 1975-9

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 34-37
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00127163
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 14 1976 12:00AM