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http://hdl.handle.net/10397/93437
Title: | Real-time joint estimation of traffic states and parameters using cell transmission model and considering capacity drop | Authors: | Zhou, Y Chung, E Cholette, ME Bhaskar, A |
Issue Date: | 2018 | Source: | 2018 21st International Conference on Intelligent Transportation Systems (ITSC), 4-7 November 2018, Maui, HI, USA, p. 2797-2804 | Abstract: | This paper contributes to an understudied category of traffic state estimation approaches, i.e. using a Godunov-type discrete traffic flow model (e.g. the Cell Transmission Model, CTM) to simultaneously estimate traffic flow parameters and traffic densities. Our main estimation algorithm is based on the CTM and the extended Kalman filter (EKF). Compared to previous studies, this study has two features. First, we take into account the effect of capacity drop, a factor that is largely ignored by previous studies in traffic state estimation. Second, a separate, supervisory observer capturing the capacity drop mode is attached to the main algorithm. Such a treatment enables the main estimation algorithm to more accurately switch between functions of free-flow regime and congested regime. It thus avoids mismatches between the applied models and the measurements, a common pitfall in conventional CTM-EKF approaches, hence can potentially enhance the quality of estimation. The proposed method was tested using micro-simulation data and showed a satisfactory performance in tracking variations of traffic flow parameters and estimating traffic densities in real time. | Keywords: | Traffic control Real-time systems Density measurement Kalman filters Observers |
Publisher: | Institute of Electrical and Electronics Engineers | ISBN: | 978-1-7281-0323-5 (Electronic ISBN) 978-1-7281-0321-1 (Print ISBN) 978-1-7281-0322-8 (USB ISBN) 978-1-7281-0324-2 (Print on Demand(PoD) ISBN) |
DOI: | 10.1109/ITSC.2018.8569805 | Rights: | © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following publication Y. Zhou, E. Chung, M. E. Cholette and A. Bhaskar, "Real-Time Joint Estimation of Traffic States and Parameters Using Cell Transmission Model and Considering Capacity Drop," 2018 21st International Conference on Intelligent Transportation Systems (ITSC), 2018, pp. 2797-2804 is available at https://doi.org/10.1109/ITSC.2018.8569805 |
Appears in Collections: | Journal/Magazine Article |
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Chung_Real-Time_Joint_Estimation.pdf | Pre-Published version | 1.12 MB | Adobe PDF | View/Open |
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