A Kalman filter based queue estimation algorithm using time occupancies for motorway on-ramps
Data(s) |
01/01/2013
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Resumo |
The primary objective of this study is to develop a robust queue estimation algorithm for motorway on-ramps. Real-time queue information is the most vital input for a dynamic queue management that can treat long queues on metered on-ramps more sophistically. The proposed algorithm is developed based on the Kalman filter framework. The fundamental conservation model is used to estimate the system state (queue size) with the flow-in and flow-out measurements. This projection results are updated with the measurement equation using the time occupancies from mid-link and link-entrance loop detectors. This study also proposes a novel single point correction method. This method resets the estimated system state to eliminate the counting errors that accumulate over time. In the performance evaluation, the proposed algorithm demonstrated accurate and reliable performances and consistently outperformed the benchmarked Single Occupancy Kalman filter (SOKF) method. The improvements over SOKF are 62% and 63% in average in terms of the estimation accuracy (MAE) and reliability (RMSE), respectively. The benefit of the innovative concepts of the algorithm is well justified by the improved estimation performance in the congested ramp traffic conditions where long queues may significantly compromise the benchmark algorithm’s performance. |
Formato |
application/pdf |
Identificador | |
Relação |
http://eprints.qut.edu.au/59002/1/Lee_and_Jiang_TRB_2012_Nov_15.pdf http://amonline.trb.org/2vdp7q/2vdp7q/1 Lee, Jinwoo (Brian), Jiang, Rui, & Chung, Edward (2013) A Kalman filter based queue estimation algorithm using time occupancies for motorway on-ramps. In Transportation Research Board 92nd Annual Meeting, 13-17 January 2013, Washington, D.C. |
Direitos |
Copyright 2013 [please consult the author] |
Fonte |
School of Civil Engineering & Built Environment; Science & Engineering Faculty; Smart Transport Research Centre |
Palavras-Chave | #090507 Transport Engineering #Queue #Queue estimation #Motorway #On-ramp #Traffic queue |
Tipo |
Conference Paper |