ADAPTIVE LOOK-AHEAD OPTIMIZATION OF TRAFFIC SIGNALS
ALLONS-D is a decentralized real-time traffic control scheme. A description of its basic architecture, system model, and optimization algorithm is given. Through simulations, the scheme is shown to be suitable for adaptive control of an isolated intersection. An efficient tree searching algorithm is used to find a traffic signal plan that minimizes delay. The search is constrained only by maximum and minimum green times per phase. The algorithm is free to consider cyclic and non-cyclic signal plans alike. The rolling horizon concept is used for the calculation and implementation of optimal signal plans. The ALLONS-D scheme has several key differences with other real time control schemes. Extensive simulation experiments on a single intersection indicate the success of the ALLONS-D scheme versus any fixed-cycle plan. The tests included a full range of uniform and non-uniform demands from low levels of saturation to the over-saturated case. For arterial networks of intersections, the scheme is shown to be capable of including a level of coordination that results in progressive signal plans. In particular, the scheme can be used to coordinate travel times on transit routes. An extension of the scheme to provide network-wide optimization of traffic signals is explained in the form of a two-layer scheme. Some preliminary results using this approach are included. Simulation experiments are performed with a newly developed traffic simulator called STNS.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/34620932
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Corporate Authors:
GORDON AND BREACH SCIENCE PUB.
AMSTERDAM:
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Authors:
- Porche, I
- Lafortune, S
- Publication Date: 1999
Language
- English
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 209-254
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Serial:
- ITS Journal
- Volume: 4
- Publisher: Taylor & Francis
- ISSN: 1024-8072
- Serial URL: http://firstsearch.oclc.org/journal=1024-8072;screen=info;ECOIP
Subject/Index Terms
- TRT Terms: Coordination; Intelligent control systems; Intelligent transportation systems; Intersections; Real time control; Route guidance; Signalized intersections; Simulation; Traffic signal control systems; Travel time
- Subject Areas: Highways; Operations and Traffic Management;
Filing Info
- Accession Number: 00765352
- Record Type: Publication
- Report/Paper Numbers: Numbers 3-4
- Files: TRIS, ATRI
- Created Date: Jun 18 1999 12:00AM