標題: A stochastic optimal control approach to real-time, incident-responsive traffic signal control at isolated intersections
作者: Sheu, JB
運輸與物流管理系 註:原交通所+運管所
Department of Transportation and Logistics Management
公開日期: 1-Nov-2002
摘要: Real-time, incident-responsive traffic control and management is vital to development of advanced incident management systems in ITS. More importantly, it provides, from an academic point of view, the linkages between incident detection, incident management, and traffic signal control. This study explores the application of a stochastic optimal control approach to real-time, incident-responsive traffic control at isolated intersections. In the methodology development, time-varying lane traffic state variables and control variables are specified to characterize sectionwide interlane and intralane traffic states under conditions of lane-blocking incidents. Following specification of system states, we formulated a discrete-time nonlinear stochastic model that comprises four types of equations, namely (1) recursive equations, (2) measurement equations, (3) incident-induced delay equations, and (4) boundary constraints. From the proposed stochastic model we then developed a stochastic optimal control algorithm to update the time-varying control variables and lane traffic state variables in real-time with lane-blocking incidents at isolated intersections. To generate traffic data used in model tests efficiently, we employed an advanced microscopic traffic simulator, Paramics, Version 3.0, which is developed to model and analyze ITS traffic flow conditions. The preliminary test results indicate that the proposed method can accomplish the goal of real-time, incident-responsive traffic signal control. In addition to proposing a new methodology, we hope that this study can initiate investigation into real-time, incident-responsive traffic control and management to achieve the final goal of networkwide incident-responsive, traffic-optimal control for incident management.
URI: http://dx.doi.org/10.1287/trsc.36.4.418.550
http://hdl.handle.net/11536/148557
ISSN: 0041-1655
DOI: 10.1287/trsc.36.4.418.550
期刊: TRANSPORTATION SCIENCE
Volume: 36
起始頁: 418
結束頁: 434
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