Quantitative assessment of the effectiveness of traffic pattern changes аt the crossroad of Kalynova Street аnd P. Kalnyshevsky Avenue (Dnipro City)

Abstract

Modern problems of traffic organization and its safety in large cities of Ukraine are considered in this study. Having analysed the variety of studies dealing with this problem it can be concluded that the use of roundabouts at the crossroads helps reduce accidents and increases the road network capacity.

The unregulated T-junction of Kalynova Street and P. Kalnyshevsky Avenue (Dnipro city) has been chosen as the study object. The purpose of the study is to provide a quantitative assessment of the technical and operational efficiency in the case of changing the traffic pattern to a roundabout.

To achieve the research objective, two simulation models (an uncontrolled T-junction and a roundabout) have been developed in the AnyLogic environment. The initial data were the results of field observations of transport and pedestrian flow intensity carried out for the morning rush hours within the period from 8 a.m. till 9 a.m.

Simulation results indicate that changing the traffic pattern at the research site made it possible to: reduce the number of car stops at the crossroad from 0.31 to 0.09, decrease the average time to travel through the crossroad from 18 s to 14 s, and increase the average vehicle speed from 43 km /h up to 49 km/h.

The value of the generalized complex criterion proposed by the authors in terms of the traffic management efficiency for the T-junction is 0.67, and for the roundabout it equals 0.98. Therefore, the overall effectiveness in the case of changing the traffic pattern at the crossroad of Kalynova Street and P. Kalnyshevsky Avenue is 47.7%.

Keywords: roundabout, efficiency, traffic management, simulation modeling, transport and operational indicators, AnyLogic.