Algorithm for Queue Estimation with Loop Detector of Time Occupancy in Off-Ramps on Signalized Motorways

Long traffic queues on off-ramps significantly compromise the safety and throughput of motorways. Obtaining accurate queue information is crucial for countermeasure strategies. However, it is challenging to estimate traffic queues with locally installed inductive loop detectors. This paper deals with the problem of queue estimation with the interpretation of queuing dynamics and the corresponding time-occupancy distribution over motorway off-ramps. A novel algorithm for real-time queue estimation with two detectors is presented and discussed. Results derived from microscopic traffic simulation validated the effectiveness of the algorithm and revealed some of its useful features: (a) long and intermediate traffic queues could be accurately measured, (b) relatively simple detector input (i.e., time occupancy) was required, and (c) the estimation philosophy was independent with signal timing changes and provided the potential to cooperate with advanced strategies for signal control. Some issues concerning field implementation are also discussed.

• Record URL:
  • https://doi.org/10.3141/2278-06
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=Algorithm+for+Queue+Estimation+with+Loop+Detector+of+Time+Occupancy+in+Off-Ramps+on+Signalized+Motorways&author=G.+Qian&author=J.+Lee&author=E.+Chung&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309223188
• Authors:
  • Qian, Gongbin
  • Lee, Jinwoo (Brian)
  • Chung, Edward
• Publication Date: 2012

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 50–56
• Monograph Title: Freeway Operations; Regional Systems Management and Operations; Managed Lanes 2012
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2278
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Algorithms; Implementation; Loop detectors; Microsimulation; Off ramps; Real time data processing; Traffic queuing
• Uncontrolled Terms: Advanced traffic signal control
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01371089
• Record Type: Publication
• ISBN: 9780309223188
• Report/Paper Numbers: 12-2046
• Files: TRIS, TRB, ATRI
• Created Date: May 25 2012 9:31AM