Abstract

Generally, at the crossroads, there is a lot of traffic jam, and during rush hour, there are many accidents. Because of the impact of U-turn intersections on how the road network operates and the characteristics of traffic, such as delay times and queues, the examination of U-turn intersections is primarily a traffic engineering effort. It is caused by the accumulation of moving vehicles and the congestion caused by the many accidents that occur in specific places. Delays and accidents are affected by many different factors. Drivers' movements (driving behaviors) and age Features of vehicles, the aggression of enemy vehicles, and their speed as traffic congestion increased, I was more likely to be able to turn. Three locations of opposite intersections in Najaf, which is 160 kilometers (about 100 miles) south of Baghdad, are the subject of the current study. Based on the acceptance or rejection of gaps, delays, and driving habits that may lead to many accidents, delays, and traffic congestion, and studying and simulating traffic volumes using the VISSIM program, the study relied on analyzing the operational performance of intersections. According to the results, the critical gaps were 3.5, 4, and 4.2 seconds, and the follow-up times were 3, 3.1, and 3.5 seconds, respectively. Studies of reversing intersections demonstrate the importance of these intersections for both traffic flow and safety.