Integrated Adaptive-Signal Dynamic-Speed Control of Signalized Arterials
Publication: Journal of Transportation Engineering
Volume 128, Issue 5
Abstract
This paper demonstrates the feasibility of an advanced concept of traffic control for congested urban arterials in an intelligent transportation system (ITS) setting. The core idea of the new concept is to integrate the capability of dynamic adaptive signals with dynamically optimized time-dependent variable speed. Under such control, speeds would be automatically optimized and set by a central computer in parallel with the other signal control parameters. Speed and signal control parameters would change between links and over time, in response to changing traffic conditions. Drivers would follow the optimized speed as they enter a link. Once an optimal speed has been set for a link, it remains constant until the control cycle ends. Link speeds would be updated only at the end of every control cycle. The control cycle may change in length as system conditions evolve. The new control concept was tested on a congested arterial with multiple links. The arterial system was modeled as a discrete event time varying dynamic system with a control period spanning several cycles. System throughput was maximized subject to such critical operational measures as intersection blockage, queue spillbacks, and other relevant traffic operation measures. Genetic algorithms were used as an optimization tool. Results show that the proposed control concept will significantly improve traffic flow. The new control concept is suitable for on-line implementation in an ITS setting.
Get full access to this article
View all available purchase options and get full access to this article.
References
Abu-Lebdeh, G., and Benekohal, R. F. (1997). “Development of a traffic and queue management procedure for oversaturated arterials.” Transportation Research Record 1603, Transportation Research Board, Washington, D.C., 119–127.
Dey, S.(1998). “Hours of congestion as a transportation measure of effectiveness under capacity constrained conditions.” ITE J. December, 30–38.
Hardbord, B. (1998). M25 controlled motorway—results of the first two years, Highways Agency, London.
Rumar, K. (1999). Speed—a sensitive matter for drivers, Nordic Road and Transport Research, No. 1, Swedish National Road and Transport Research Institute, 20–22.
Tignor, S. C., et al. (1999). “Innovative traffic control—technology and practice in Europe.” Rep. No. FHWA-PL-99-021, HPIP-10/8-99(6M)EW, Federal Highway Administration, Washington, D.C.
Turner, D.(1999). “A call to arms: are we ready for tomorrow’s challenge when we are still struggling with today?” ITE J. January, 26–31.
Information & Authors
Information
Published In
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Dec 26, 2000
Accepted: Jan 3, 2002
Published online: Aug 15, 2002
Published in print: Sep 2002
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.