Evaluation of the efficiency of a roundabout

Abstract

Roundabouts are a popular solution for traffic interchanges. Their number is growing every year, mainly for reasons of safety and high quality of service for all road users.

Currently, there is a global motorization of the population, there is a constant increase in the number of vehicles, and this is typical for every city and town. Therefore, the design of roundabouts should take into account all trends in the development of transport infrastructure and population demographics, and should be constantly monitored.

Each intersection has its own defining characteristics that can affect its safety and ease of use, but require a careful approach for specific road conditions (often finding the right balance between safety and capacity). They are designed in different sizes for specific purposes and operating conditions.

Detailed control of all parameters of a roundabout will allow to fully assess its operational, safety and environmental performance, identify weaknesses and timely introduce alternative options for improving efficiency.

The article summarizes the results of research on the geometric design, intensity, capacity and safety of a roundabout in Dubno, Rivne region, which was put into operation in 2019.

The purpose of this study is to determine the efficiency and safety of a roundabout and collect the necessary data to build a mathematical model with traffic simulation for different options for passing such an intersection.

Key words: roundabout, traffic flow, intensity, capacity, safety, geometry.