The effectiveness of using variable speed limit on the performance of an interrupted flow

Al-Nuaimi, Hamdi and Ayers, Ron and Somasundaraswaran, Kathirgamalingam (2012) The effectiveness of using variable speed limit on the performance of an interrupted flow. In: IASTED International Conference on Engineering and Applied Science (EAS 2012): Applications for the 21st Century , 27-29 Dec 2012, Colombo, Sri Lanka.

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The urban traffic congestion is getting worse with ever increasing urban population and vehicle ownership. The long queues at intersections and blockage of traffic on urban arterial roads become routine during the peak hours. Interrupted traffic flow through signalised intersections and arterial roads have badly been affected by these occurrences. Thus this paper examines the possibility of employing variable speed limit (VSL) for upstream traffic during the peak period to improve the traffic performance through signalised intersections as well as in urban arterials. The micro simulation software VISSIM was used to examine a hypothetical road network under VSL application. An expected traffic flow near capacity condition was simulated several times to see the effectiveness. Results show that for a reasonable period of time, the VSL application to the upstream traffic improve the traffic performance at immediate downstream intersections in terms of vehicle delay (16%), average queue length (18%) and average number of stops per vehicles (16%), while intersections located far from the VSL application has no or little effect. Similarly, the arterial performances have also been improved for a short period of time on the immediate downstream link in terms of density (13%), space mean speed (10%) and traffic flow (2%), the effective is negligible on the links located far. In addition a slight improvement was noticed to the total journey time on the immediate link

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: All IASTED Journals and Proceedings are published through ACTA Press, and as such the IASTED's copyright policy assigns copyright to IASTED and ACTA Press.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 02 May 2013 04:24
Last Modified: 31 Mar 2015 00:10
Uncontrolled Keywords: interrupted traffic flow; variable speed limit; VISSIM; traffic simulation
Fields of Research : 12 Built Environment and Design > 1205 Urban and Regional Planning > 120506 Transport Planning
09 Engineering > 0905 Civil Engineering > 090507 Transport Engineering
08 Information and Computing Sciences > 0801 Artificial Intelligence and Image Processing > 080110 Simulation and Modelling
Socio-Economic Objective: B Economic Development > 88 Transport > 8801 Ground Transport > 880106 Road Infrastructure and Networks
Identification Number or DOI: 10.2316/P.2012.785-065

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