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ScientificWorldJournal. 2014;2014:629412. doi: 10.1155/2014/629412. Epub 2014 Jun 4.

Intelligent advisory speed limit dedication in highway using VANET.

Author information

  • 1Department of Computer System and Technology, University of Malaya, 50603 Kuala Lumpur, Malaysia.
  • 2Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305701, Republic of Korea.
  • 3Department of Computer Engineering, Yeungnam University, Gyeongsan 712749, Republic of Korea.


Variable speed limits (VSLs) as a mean for enhancing road traffic safety are studied for decades to modify the speed limit based on the prevailing road circumstances. In this study the pros and cons of VSL systems and their effects on traffic controlling efficiency are summarized. Despite the potential effectiveness of utilizing VSLs, we have witnessed that the effectiveness of this system is impacted by factors such as VSL control strategy used and the level of driver compliance. Hence, the proposed approach called Intelligent Advisory Speed Limit Dedication (IASLD) as the novel VSL control strategy which considers the driver compliance aims to improve the traffic flow and occupancy of vehicles in addition to amelioration of vehicle's travel times. The IASLD provides the advisory speed limit for each vehicle exclusively based on the vehicle's characteristics including the vehicle type, size, and safety capabilities as well as traffic and weather conditions. The proposed approach takes advantage of vehicular ad hoc network (VANET) to accelerate its performance, in the way that simulation results demonstrate the reduction of incident detection time up to 31.2% in comparison with traditional VSL strategy. The simulation results similarly indicate the improvement of traffic flow efficiency, occupancy, and travel time in different conditions.

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