Article

Received 11.02.2025

Revised 10.05.2025

Accepted 28.06.2025

Retrieved from Vol. 29, No. 1, 2025

Pages 116 -126

Petrovych, V., Vyhovska, V., & Tkachenko, D. (2025). Methods for improving traffic flow at roundabouts. The National Transport University Bulletin, 29(1), 116-126. https://doi.org/10.33744/2308-6645-2025-1-60-116-126

Methods for improving traffic flow at roundabouts

Volodymyr Petrovych Inna Vyhovska Dmytro Tkachenko

The article discusses modern approaches to traffic flow management using the example of the use of right-turn lanes at roundabouts. These elements of road infrastructure make it possible to significantly increase traffic capacity, reduce congestion and the number of conflict points, which has a positive effect on traffic safety. Object: right-turn lanes at roundabouts in urban and suburban areas. The purpose of this work is to analyze the functional capabilities of designated right-turn lanes, evaluate their advantages and disadvantages, and develop recommendations for their implementation, taking into account the safety of all road users. Research methods included analysis of scientific sources, study of international design experience, transport modeling using PTV Vissim and Aimsun software packages, and assessment of the operational performance of constructed solutions in Lviv and Kyiv. As a result, it was established that the use of separated right-turn lanes reduces the load on roundabouts, increases the throughput capacity of the transport network, and ensures traffic continuity. The 126 novelty lies in the adaptation of international approaches to Ukrainian conditions, taking into account limited urban space and increased safety requirements for pedestrians and cyclists. The degree of implementation in Ukraine is limited to isolated projects in Lviv and Kyiv, but this technology is widely used in global practice. It is predicted that further development of this technology in Ukraine will be linked to the spread of transport modeling, the integration of intelligent traffic management systems, and the creation of infrastructure focused on the safety of vulnerable road users. Key technical and operational characteristics include design turning radii (15–120 m depending on speed), lane width (6 m with reinforced shoulders), the use of transition lanes or controlled exits, and the use of safety islands and markings

traffic flows; traffic organization; roundabout junctions; throughput capacity; road safety; traffic modeling; right-turn exits
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https://doi.org/10.33744/2308-6645-2025-1-60-116-126