Multi-detector layout method of transit signal priority control comprehensively considering the priority strategies and speed fluctuations

Dongle Wang; Jinxin Wang; Xin Zhong; Hailong Ding

doi:10.1117/12.2613691

10 November 2021 Multi-detector layout method of transit signal priority control comprehensively considering the priority strategies and speed fluctuations

Dongle Wang, Jinxin Wang, Xin Zhong, Hailong Ding

Author Affiliations +

Proceedings Volume 12050, International Conference on Smart Transportation and City Engineering 2021; 120500K (2021) https://doi.org/10.1117/12.2613691
Event: 2021 International Conference on Smart Transportation and City Engineering, 2021, Chongqing, China

Abstract

Bus detector layout is essential for detecting reactive transit signal priority (TSP) at an intersection, and a single-step detection concerned in practice difficultly takes into account the fluctuation of operating speed and the flexibility of adjusting the timing scheme. Therefore, synthetically considering the two factors, a multi-step detector layout algorithm, involving two types of detectors, is proposed and the corresponding detection mechanism is performed for TSP. Based on the constraint of four bus arrival conditions and two priority strategies, a preview detector layout algorithm is established with a low fail-priority rate, which satisfies the premise of adjusting the scheme with certain flexibility for the worst condition. Then, in the near position, a confirm detector is installed to modify the deviation of travel time caused by the speed fluctuation and correct the priority scheme. Moreover, an intersection simulation scenario with TSP is carried out based on VISSIM and VAP, and four cases are established for the sensitivity analysis of the detectors’ positions. As the distance of the preview detector increases, the fail-priority rate decreases stepwise, and the efficiency is better at 450m, in Case ①. When the confirm detector is set at 150 m, the adverse efficiency caused by speed fluctuation is effectively alleviated, with the average vehicle delay reduced to 5.1 s/veh, in Case ③. Thus, the simulation result shows that the optimal detector distances are 450m, and 150m respectively, which verifies that the bus detector layout algorithm could effectively improve the bus operation efficiency and reliability.

Citation Download Citation

Dongle Wang, Jinxin Wang, Xin Zhong, and Hailong Ding "Multi-detector layout method of transit signal priority control comprehensively considering the priority strategies and speed fluctuations", Proc. SPIE 12050, International Conference on Smart Transportation and City Engineering 2021, 120500K (10 November 2021); https://doi.org/10.1117/12.2613691

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KEYWORDS

Sensors

Detection and tracking algorithms

Signal detection

Statistical analysis

Computer simulations

Control systems

Information operations

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