Modelling Signal Platoon Patterns by Approach Lane Use and Movement Class

A lane-based signal platoon progression model has been developed for estimating performance measures as a function of signal offsets, geometric design and flow conditions. This is part of a lane-based network model that involves the blockage of upstream intersection lanes by downstream queues (backward spread of congestion) and a capacity constraint applied to oversaturated upstream intersections. The model takes into account midblock lane changes that apply to signal platoon patterns. This is particularly important in evaluating closely-spaced intersections with high demand flows where vehicles have limited opportunities for lane changes between intersections. The modelling of signal platoon patterns is further enhanced by assigning two types of movements negotiating the network to special movement classes. These are the through movements at external approaches which become turning movements at downstream internal approaches, and the dogleg movements at staggered T intersections. These movements can be assigned to separate lanes and separate signal phases, and their second-by-second platoon patterns can be tracked through the network separately. This improves the quality of signal platoon modelling and is expected to produce better results in assessing signal coordination quality and optimising signal offsets. The use of special movement classes also helps to estimate unequal lane use cases at external approaches of a paired intersection system, a factor which also affects signal platoon patterns. A staggered T-intersection example is presented to demonstrate important aspects of modelling signal platoon patterns by approach lane use and movement class.

• Summary URL:
  https://doi.org/10.2495/UT150421
• Summary URL:
  http://www.witpress.com/elibrary/wit-transactions-on-the-built-environment/146/34114
• Availability:
  • Find a library where document is available. Order URL: http://www.witpress.com/books/978-1-84564-898-5
• Supplemental Notes:
  • Abstract reprinted with permission from WIT Press.
• Corporate Authors:

  WIT Press

  Ashurst Lodge
  Ashurst, Southampton  United Kingdom  SO40 7AA
• Authors:
  • Akçelik, R
• Conference:
  • 21st International Conference on Urban Transport and the Environment
  • Location: València , Spain
  • Date: 2015-6-2 to 2015-6-4
• Publication Date: 2015

Language

• English

Media Info

• Media Type: Web
• Pagination: 12p
• Monograph Title: Urban Transport XXI
• Serial:
  • WIT Transactions on the Built Environment
  • Issue Number: 146
  • Publisher: Wessex Institute of Technology
  • ISSN: 1743-3509
  • Serial URL: http://library.witpress.com/pages/listBooks.asp?tID=2

Subject/Index Terms

• TRT Terms: Intersections; Lane changing; Traffic congestion; Traffic flow; Traffic platooning; Traffic signal control systems; Turning traffic
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01568238
• Record Type: Publication
• ISBN: 9781845648985
• Files: TRIS
• Created Date: Jun 26 2015 5:12PM