Passing Rates to Measure Relaxation and Impact of Lane-Changing in Congestion

Passing rate measurements of backward-moving kinematic waves in congestion are applied to quantify 2 traffic features; a relaxation phenomenon of vehicle lane-changing and impact of lane-changing in traffic streams after the relaxation process is complete. The relaxation phenomenon occurs when a lane-changer or its immediate follower accepts a short spacing upon insertion and gradually resumes a larger spacing. A simple existing model describes this process with few observable parameters. In this study, the existing model is reformulated to estimate its parameter using passing rate measurements. Calibration results based on vehicle trajectories from 2 freeway locations indicate that the revised relaxation model matches the observation well. The results also indicate that relaxation occurs in about 15 seconds and that the shoulder lane exhibits a longer relaxation duration. The passing rate measurements were also employed to quantify the postrelaxation impact of multiple lane-changing maneuvers within a platoon of 10+ vehicles in queued traffic stream. Analysis of the same data sets shows that lane-changing activities do not induce a long-term change in traffic states; traffic streams are perturbed temporarily by lane-changing maneuvers but return to the initial states after relaxations.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10939687
• Authors:
  • Duret, Aurelien
  • Ahn, Soyoung
  • Buisson, Christine
• Publication Date: 2011-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 285-297
• Serial:
  • Computer-Aided Civil and Infrastructure Engineering
  • Volume: 26
  • Issue Number: 4
  • Publisher: Blackwell Publishing
  • ISSN: 1093-9687
  • Serial URL: http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1467-8667

Subject/Index Terms

• TRT Terms: Kinematics; Lane changing; Passing; Traffic congestion; Traffic flow; Traffic models; Vehicle spacing
• Uncontrolled Terms: Traffic relaxation
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 01336990
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 18 2011 12:24PM