Applying Intelligent Transportation System in Determining Safe Speed Limits by Heuristic Approach

Nowadays, according to the importance of safe transportation in permanent economic development, using new approaches which lead to improving the safety and quality of roads is vital. Many experts believe that intelligent transportation systems are the suitable solution to achieve this goal. One of the transportation system’s intelligence component is determination of the roads safe speed limits which directly affect the roads traffic volume and safety. In this paper the determination of safe speed limits and the effective indexes are discussed by introducing a heuristic approach for defining safe speed limits dynamically based on the roads conditions. This approach aims to reduce accidents caused by the drivers’ unawareness of the roads conditions or the drivers’ inexperience in determining safe speed. In this approach the safe speed is determined with considering the difference between the roads current and the ideal conditions. Finally, a numerical example is applied to describe the proposed approach.