Using Computer Techniques to Evaluate a Three-way Intersection with a traffic Signal

(Surman City – Case Study)

Abstract

Due to the stagnation of the development of the road network during these years and increases in the number of vehicles with the increase in traffic, many problems and negative effects appeared on the roads and their intersections in the city of Surman, which led to many traffic congestion and accidents at the level of road intersections. Therefore, it is necessary to improve their service levels and facilitate traffic movement through them. In this study, computer techniques were used to achieve the main objective of this study, which is to evaluate the performance of the current situation of a three-way intersection organized by a traffic signal (the intersection of the coastal road with the entrance road to the field in Surman) and determine the level of service for intersection using the Synchro 08 program and work to improve the level of service in the event of its decline and find appropriate solutions according to the field data of the intersection through two-and three-dimensional simulation provided by program to help us choose the optimal and appropriate solution for intersection. The mechanism of work was represented in collecting engineering and traffic data for the intersection in the study area and then analyzing and simulating with the Synchro 08 program for the current situation. It was found that the service level for the intersection F with a delay of (284.5 sec/veh) and the maximum volume rate for capacity (v/c = 1.76). Accordingly, two alternatives were proposed for this intersection and using the program it was found that the best alternative is to expand the intersection area by making the U-turn movement (Spilt Turn Type EBU) in a lane separate from the (EBT) traffic lanes, the results of which showed that the service level of the intersection improved to level C with a delay of (22.6 sec/veh) and a maximum volume ratio of (v/c=0.98).