Variable Speed Limits: Strategies to Improve Safety and Traffic Parameters for a Bottleneck
The primary purpose of the speed limit system is to enforce reasonable and safe speed. To reduce secondary problems such as accidents and queuing, Variable Speed Limits (VSL) has been suggested. In this paper VSL is used to better safety and traffic parameters. Traffic parameters including speed, queue length and stopping time have been pondering. For VLS, an optimization decision tree algorithm with the function of microscopic simulation was used. The results in case of sub saturated, saturated and supersaturated at a bottleneck are examined and compared with the Allaby logic tree. The results show that the proposed decision tree shows an improved performance in terms of safety and comfort along the highway. The VSL pilot project is part of the Road Safety Improvement Program included in Iran’s road safety action plan that is in the research process in the BHRC Research Institute, Road and Housing & Urban Development Research that is planned for next 10-year Transportation safety view Plan.
World Health Organization, Global Status Report on Road Safety 2013: Supporting a Decade of Action, Geneva, Switzerland, 2013.
T. Bliss, B. Jeanne, Road Safety Management Capacity Reviews and Safe System Projects Guidelines, Working Paper 84203, Washington, DC, World Bank Group, 2013
Federal Highway Administration, Impacts of Technology Advancements on Transportation Management Center Operations Final Report, FHWA-HOP-13-008, 2013
Austroads Research Report, Best Practice for Variable Speed Limits: Literature Review, Austroads, Sydney, 2009
C. Lee, B. F. Hellinga, F. Saccomanno, “Assessing safety benefits of variable speed limits”, Transportation Research Record 1897, TRB, National Research Council, Washington, D.C, Vol. 1, No. 1, pp. 183-190, 2004 DOI: https://doi.org/10.3141/1897-24
M. Abdel-Aty, J. Dilmore, A. Dhindsa, “Evaluation of variable speed limits for real-time freeway safety improvement”, Accident Analysis & Prevention,Vol. 38, No. 2, pp. 335-345, 2006 DOI: https://doi.org/10.1016/j.aap.2005.10.010
P. Allaby, B. Hellinga, M. Bullock, “Variable Speed Limits: Safety and Operational Impacts of a Candidate Control Strategy for Freeway Applications”, IEEE Transactions on Intelligent Transportation Systems, Vol. 8, No. 4, pp. 671-680, 2007 DOI: https://doi.org/10.1109/TITS.2007.908562
R. Carlson, I. Papamichail, M. Papageorgiou, A. Messmer, “Variable Speed Limits as a Mainline Metering Device for Freeways”, Transportation Research Board Annual Meeting, Washington, DC, Paper #10-1529, 2010
M. Abdel-Aty, R. Cunningham, V. Gayah, L. Hsia, “Dynamic Variable Speed Limit Strategies for Real-Time Crash Risk Reduction on Freeways”, Transportation Research Record No. 2078, Transportation Research Board of the National Academies, Washington, DC, Vol. 1, No. 1, pp. 108-116, 2008 DOI: https://doi.org/10.3141/2078-15
FHWA-SA-12-022, “Guidelines for the use of variable speed limit systems in wet weather”, US Department of Tranportation, 2012
F. Rahmani, F. Ghahari , Weka Software Guide, 2010
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