IMPROVED STRATEGIES FOR DEPLOYING VEHICLE-ACTUATED CONTROL AT ISOLATED SIGNALIZED INTERSECTIONS. FINAL REPORT

This research has sought to demonstrate potential benefits from deploying enhanced vehicle actuation strategies at isolated signalized intersections. The work has exploited microscopic, stochastic simulation to evaluate the impacts of enhanced vehicle-actuated (VA) control schemes for an array of operating conditions. Simulated outcomes (i.e., average vehicle delays) generated under the enhanced strategies were compared with outcomes resulting from more conventional VA control policies. Findings from this work suggest that substantial delay reduction generally occurs by exploiting VA strategies which seek to 1) facilitate the use of the clearance interval by discharging vehicles, 2) shorten the duration of the required clearance interval by only serving, to the extent possible, queued vehicles, and 3) evaluate gaps in individual traffic streams. The enhanced VA strategies described and tested in this research are inconsistent with conventional practice. Nonetheless, these enhanced schemes do not compromise traffic safety as motorists legally entitled to enter the intersection are always allocated clearance interval of sufficient duration.

• Supplemental Notes:
  • Published July 20, 1994; revised May 26, 1995.
• Corporate Authors:

  Purdue University/Indiana Department of Transportation JHRP

  Purdue University, School of Civil Engineering
  West Lafayette, IN  United States  47907-1284

  Indiana Department of Transportation

  100 N Senate Avenue
  Indianapolis, IN  United States  46204

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Cassidy, M J
  • Chuang, Y
  • Vitale, J
• Publication Date: 1995-5-26

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 60 p.

Subject/Index Terms

• TRT Terms: Benefits; Clearance interval (Traffic signal cycle); Isolated intersections; Signalized intersections; Simulation; Traffic actuated controllers; Traffic delays
• Old TRIS Terms: Isolated signalized intersections
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00682809
• Record Type: Publication
• Report/Paper Numbers: FHWA/IN/JHRP-94/8, Proj No. C-36-17RR
• Files: TRIS, USDOT, STATEDOT
• Created Date: Aug 11 1995 12:00AM