Prototype System for Real-time Incident Queue Overflows Responsive Traffic Signal Control
| Autor: | Shen-Chang Lin, 林聖章 |
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| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 Real-time incident Queue overflows responsive traffic control and management is a vital issue to the development of advanced incident management systems in ITS. In order to develope an incident queue overflows management system, must either apply real-time queue overflows prediction and develop an incident queue overflows responsive traffic singal control system, to promote traffic more efficinet and mobility. The system specification presume that when an lane-blocking incident occurred on the zone of a given link between two sequential intersections to induce queue overflows beyond the upstream detectors of upstream intersection, by effectively controling the two sequential intersestions’ signals, to reduce the influence of the incident queue overfolws. In the methodology development, the mainly proposed method and related concepts are extended from Sheu’s early reserches. Following specification of system states, a stochastic model which comprises four types of equations, including : 1) recursive equations, 2) measurement equations, 3) incident-induced delay equations and 4) boundary constraints, is formulated. The technologies involved in the algorithm primarily include extended Kalman filter and L.Q.G to resulting the proposed stochastic model. Based on the proposed stochastic model, a stochastic optimal control algorithm is then developed in an effort to update the time-varying control variables as well as lane traffic state variables in the real time. To generate efficiently traffic data used the model tests, an “ real-time incident responsive traffic simulator signal control system “ have developed by this reserch. The preliminary test results indicate that the proposed method is better than other comparisive signal control methods and is promising to accomplish the goal of real-time incident queue overflows responsive traffic signal control . |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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