THE CHOICE AND REASONING OF THE BUS RAPID TRANSIT SYSTEMS FOR CITY TRANSPORT

SAKHNO, Volodymyr; KRAVCHENKO, Oleksandr; KORPACH, Anatolii; KORPACH, Oleksii; BOSENKO, Volodymyr; DIŽO, Ján; BLATNICKÝ, Miroslav · 2024 · Crossref

DOI: 10.20858/sjsutst.2024.123.13

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Summary

This study addresses the optimization of Bus Rapid Transit (BRT) systems for urban transport, specifically focusing on the design of a driving cycle and the selection of appropriate rolling stock for a proposed BRT line in Kyiv, Ukraine. The research is motivated by the increasing demand for public transportation and the need to improve system efficiency, speed, and fuel economy. The authors aim to provide technical and financial justification for implementing a BRT system connecting the Vyghurivshchyna-Troyeshchyna residential area with the Pochaina underground station, a project previously proposed but not yet implemented. The methodology involves mathematical modeling to evaluate the performance characteristics of buses under realistic operating conditions. The authors developed a specific driving cycle for the 11.1 km route, which includes 13 stops and two types of traffic sections based on distance between stops. The model accounts for acceleration, steady-state motion, retarding, and idling phases. Using differential equations of rectilinear motion, the study calculates key performance indices, including traffic time, fuel consumption, and average velocity. The analysis compares two articulated bus models currently in service in Kyiv: the MAZ-215 and the LAZ-A292. Calculations were performed for both full loading (28,000 kg) and half loading (22,300 kg) scenarios, testing steady traffic speeds ranging from 50 to 80 km/h. The results indicate that two-link articulated buses are the most suitable choice for this BRT route. Specifically, the MAZ-215 outperforms the LAZ-A292 in terms of efficiency. The MAZ-215 demonstrated lower fuel consumption, shorter operation times, and higher average speeds under both full and half-loading conditions. The study identified optimal steady traffic speeds of 50 km/h for sections up to 1 km long and 60–70 km/h for sections exceeding 1 km. Under these optimal conditions, the driving time for the BRT line ranges from 20.1 to 23.4 minutes. This is significantly faster than the scheduled driving time for trolleybuses on the same route. Additionally, the MAZ-215 achieved the lowest fuel consumption per passenger, making it the most economically viable option for exploitation. The significance of this research lies in providing a data-driven framework for selecting BRT rolling stock and optimizing operational parameters. By demonstrating that the MAZ-215 offers superior efficiency and speed compared to other available models, the study supports the technical justification for implementing the proposed BRT system in Kyiv. The findings contribute to the broader field of urban transport planning by highlighting the importance of mathematical modeling in assessing vehicle performance and fuel efficiency before deployment. This approach can help city managers and designers improve the quality of public transport functioning while reducing operational costs and environmental impact.

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• speed choice