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Library of Resources to Improve Roadway Work Zone Safety for All Roadway Users

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Publication

Fault-Tolerant Variable Speed Limit Control for Freeway Work Zone

Author/Presenter: Du, Shuming; Razavi, Saiedeh
Abstract:

Freeway work zone can easily lead to traffic congestion which has detrimental effects on travel time and safety. By using the detected traffic states near work zone area, variable speed limit (VSL) control system has been widely studied to improve traffic mobility and safety. However, occurrence of sensor fault can cause traffic state deviation and system degradation. Therefore, this study presents a fault-tolerant VSL control system for freeway work zone. A traffic flow model was first designed to analyze the traffic dynamics. Then a sliding mode controller for VSL was designed based on the previous study. By comparing the estimated traffic states from Kalman filter with the observed states from the observer, the developed fault diagnosis can detect the sensor fault and reconfigure the controller. The proposed system was evaluated under a realistic freeway work zone environment in traffic simulator SUMO. The results show the proposed system can achieve fault tolerance and improve traffic mobility and safety under fault-free and sensor-fault scenarios.

Source: 26th International Workshop on Intelligent Computing in Engineering (EC-ICE-2019), Leuven, Belgium, June 30 to July 3, 2019.
Publication Date: 2019
Full Text URL: Link to URL
Publication Types: Books, Reports, Papers, and Research Articles
Topics: Traffic Flow; Traffic Models; Variable Speed Limit Systems; Work Zones

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