FEATURES OF TRAFFIC ORGANIZATION AT CITY INTERSECTIONS

Abstract

The organization of road traffic at complex intersections is very important, since about 80% of traffic accidents occur precisely at such sections of the road. This article examines the intersection of the city of Sumy, which belongs to such accident-prone sections of the road. The intersection of Kharkivska Street, Heroes of Sumshchyna Street, Gagarin Street, and Pokrovska Square is under consideration, which is located in the central part of the city and is an important node at the intersection of the main transport corridors of the city. Analyzing the situation on this section of the road, we came to the conclusion that the study and analysis of the movement of vehicles at this intersection has an important applied value for the city. A number of factors have been identified at the intersection that contributed to the occurrence of traffic accidents, some of these factors provoke violations of traffic rules, and the constructively created intersection has a rather large load, which leads to complications in the departure of vehicles and the occurrence of traffic accidents. According to the analyzed data, 17 traffic accidents were recorded from 2018 to 2021. The article provides data by year, where it can be seen that the accident rate of the intersection is increasing every year. If we compare 2018 and 2020, the number of accidents has increased 4 times. When comparing 2020 and 10 months of 2021, the accident rate increased 2.5 times. When comparing 2018 and 10 months of 2021, the accident rate increased 10 times. The modern PTV VISSIM software was used during analysis and simulation. In order to simulate the optimized intersection, the phase-by-phase interchange and cyclogram were modified, taking into account right turns and separately from the movement of straight left turns from the street. Heroes of Sumy Oblast, with high traffic intensity. From Gagarina Street to the left, the flow is up to 30 cars/hour, from Pokrovska Square to the right, the flow is up to 15 cars/hour. Thus, a step-by-step program for the implementation of measures was developed that would contribute to increasing traffic safety at these intersections. The best solution for the studied intersection is to preserve the traffic light regulation with the regulation of the area of the intersection (between the stop lines) and the creation of a conflict-free phase intersection. A program of implementing changes for the intersection was developed in 3 stages: 1st stage – the main stage, 2nd stage – after 2-3 years after the implementation of the 1st stage, 3rd stage – after 4-5 years after the implementation of the 2nd stage.