Real-Time Traffic Signal Delay Estimation Using State-of-the-Practice Detection Technology: A Simulation Proof-of-Concept

Delay has long been recognized as the primary indicator of traffic signal performance. Recent research into real time delay estimation has tended to focus on one of three methods of determining delay: probes, tracking, and input-output techniques. One of the issues with all three of these methods is their dependence on new and/or advanced detection capabilities. The purpose of this study was to determine if real time delay estimates of reasonable accuracy could be made using only state-of-the-practice detection technologies. Several models were developed to predict approach delay using only volume and occupancy. As a proof of concept, these investigations were very promising. Prediction models were developed based on an excessively over-detected approach (for comparison purposes), based on approaches with 100’ and 200’ loop spacing, and based on approaches with two loop detectors: one at the stop line and one located some distance upstream. Of these, the two loop models show the most promise for field deployment, as they continued to provide reasonable predictions of approach delay without the need for an excessive number of loops on the approach.


  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References;
  • Pagination: 17p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01154531
  • Record Type: Publication
  • Report/Paper Numbers: 10-2691
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 11:18AM