Influence of Signal Phasing Sequence and Intersection Spacing on Progression Bandwidth

This study provided quantitative analyses from several perspectives of signal timing related to progression bandwidth, including: 1) the influence of signal phasing sequence, 2) the impact of intersection spacing, and 3) the impact of number of signals in a system. A large number of arterial scenarios were randomly generated to simulate a wide range of traffic signal systems that likely exist in the real world. After comparing the effectiveness of four phasing sequences, it was concluded that lead-lag or lag-lead phasing sequence was used 5% more than leading or lagging. However, there was no significant difference between leading and lagging or between lead-lag and lag-lead. The impact of intersection spacing was analyzed by comparing uniformly and randomly spaced signal systems. Contradict to the common belief, uniformly spaced signal systems did not provide better progression bandwidth than non-uniformly spaced systems. In fact, leading and lagging phasing sequences showed higher likelihood to be used at non-uniformly spaced systems. The study also found that the number of signals had a significant impact on bandwidth attainability. When the number of intersections exceeded 16, there were practically no two-way bandwidth solutions, suggesting that bandwidth based signal timing approach may not be feasible.


  • English

Media Info

  • Media Type: DVD
  • Features: Figures; References; Tables;
  • Pagination: 13p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01152377
  • Record Type: Publication
  • Report/Paper Numbers: 10-1461
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 10:39AM