Decentralized artificial intelligent traffic control

Pao Yue-kong Library Electronic Theses Database

Decentralized artificial intelligent traffic control

 

Author: Heung, Tsan-hing
Title: Decentralized artificial intelligent traffic control
Degree: M.Phil.
Year: 2001
Subject: Traffic engineering
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Electrical Engineering
Pages: 129 leaves : ill. ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1563085
URI: http://theses.lib.polyu.edu.hk/handle/200/3694
Abstract: A generic decentralized traffic junction controller using artificial intelligence is constructed. The controller is simple in structure and does not require any geographic knowledge of the junction. Each junction has a decentralized traffic junction controller that can be connected together to form traffic network control. Number of controllers can join together to form a large network. The controller consists of 3 modules, a local decision module, an optimization module and a junction coordination module. The local decision module is a fuzzy controller with a hierarchical structure. The optimization module use Genetic Algorithms to generate fuzzy rules for the local decision module. The junction coordination module adopts real time dynamic programming to obtain coordinated result. Several optimization techniques are used to enhance the performance of the controller, such as hierarchy and time alignment. Cross-junction with turning traffic is modeled. Computer simulation is used to evaluate the performance of the controller against fixed-time approach. The controller can improve up to 20% and 8% for single and multiple junction environments respectively. Other approaches that can further improve the controller are also discussed at the end.

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