As a result of the study, it was found that application of the TRANSYT-7F program, to the already coordinated systems, did not improve traffic flow. However, changing from an actuated to a fixed-time coordinated signal system did improve traffic flow. This change caused the percent of vehicles stopping to decrease 8%. This finding is consistent with other studies that have found a larger improvement when changing from uncoordinated signal systems to a coordinated signal system than when optimizing a coordinated signal system. Another finding of the study had to do with the relationship between vehicle stops and CO concentrations. This relationship indicates that a ten percent reduction in the number of vehicles stopping would result in a five to seven percent reduction in carbon monoxide concentration depending on the total number of vehicles entering the intersection and the wind speed. (Author)

  • Supplemental Notes:
    • This paper was presented during the Institute of Transportation Engineers 54th Annual Meeting, San Francisco, California, September 23-27, 1984.
  • Corporate Authors:

    Institute of Transportation Engineers (ITE)

    Washington, DC  United States 
  • Authors:
    • Schlappi, M L
  • Conference:
  • Publication Date: 1984

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 5-9

Subject/Index Terms

Filing Info

  • Accession Number: 00390614
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 30 1985 12:00AM