A Traffic Analysis and Redesign of Transportation Facilities: A Case of Imam Abdullah Bin Saud Road and Khaled Bin Al Walid Street Interchange

Abstract

According to the definition of transportation, a movement of people and goods from one location to another location, we look for transportation facilities to contribute to a smooth traffic movement in a desirable and sustainable manner. Therefore, in case there is any facility which is suffering from chronic congestions, then it is inevitable to consider an improvement of it. The intersection which is located at Imam Abdullah Bin Saud Road and Khaled Bin Al Walid Street was selected as a target to be considered in this study, since it faces huge traffic volume all day long and suffers from serious jams and disorders every day. To give a recommendable solution to it, first, we checked the current condition of the intersection; described available alternatives for the improvement of the target; collected traffic data with geometric considerations; and achieved capacity analysis to compare two considerable design alternatives with the current design. Through this process, we found that the level of service of current intersection is F with 190 seconds of control delay. Replacing the current intersection with either SPDI or CDI can reduce about 60% of delay and improve the quality of traffic flow. Even the results of SPDI were slightly better than those of CDI. We concluded that the city of Riyadh should take an urgent step to improve the site by applying the results which we drew from this research. Additionally, we kindly recommend ADA and Riyadh Municipality to do basic studies more on Riyadh traffic characteristics for future research and facility improvements.