This paper reports the results of a study of the effects of commercial vehicles on intersection delay. The objective was to determine the delay to through traffic at signalized intersections caused by commercial vehicles and to determine the effect of intersection corner radii on right-turn speeds of commercial vehicles. Commercial vehicles are defined as any vehicle having at least six tires and two or more axles. Data were collected at intersections in five cities in Indiana. Twenty-three intersection approaches were studied for commercial vehicle delay, and 19 intersection corner radii were studied for right-turn speeds of commercial vehicles. The results of this research are both quantitative and qualitative. It was found that the average travel time of a passenger car through a signalized intersection was increased from 39.9 to 49.4s where one or more commercial vehicles were traveling ahead of it in the same platoon of vehicles. Significant factors or variables were found to either increase of decrease delay due to commercial vehicles. Right-turn speeds of passenger cars, truck combinations, and commercial vehciles were found for varying intersection corner radii. From a delay viewpoint, a 9-m (30-ft) radius was found to be optimum for a singly-unit truck and an 68-m (60-ft) radius was found optimum for a truck combination. /Author/

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 59-65
  • Monograph Title: Freeways, automatic vehicle identification, and effects of geometrics
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00153162
  • Record Type: Publication
  • ISBN: 0309025702
  • Files: TRIS, TRB
  • Created Date: May 31 1977 12:00AM