01371089

Component

https://doi.org/10.3141/2278-06

http://scholar.google.com...hung&publication_year=2012

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.

01454291

12-2046

English

pp 50–56

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309223188

Print

Figures; References

Algorithms; Implementation; Loop detectors; Microsimulation; Off ramps; Real time data processing; Traffic queuing

Advanced traffic signal control

Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Feb 8 2012 5:07PM

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