Impact of Vrus on the Capacity of Single-lane Roundabouts
| DOWNLOAD | DOI: 10.62897/COS2024.2-1.28 |
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Author: Othmane Boualam, Attila Borsos Széchenyi István University Boualam.othmane@sze.hu |
Abstract: This study examines the influence of Vulnerable Road Users (VRUs), specifically pedestrians and cyclists, on the entry capacity of urban single-lane roundabouts using non-linear regression modeling, with implications for sustainable urban transportation planning. Data were collected at a single-lane roundabout in Győr, Hungary, through video surveillance, capturing interac- tions among vehicles, pedestrians, and cyclists during peak traffic hours. The analysis demon- strated that incorporating pedestrian and cyclist volumes into the capacity models significantly improved predictive accuracy, increasing R² values from 0.5 (vehicles only) to over 0.8 in the extended models. The results indicate that pedestrian and cyclist interactions reduce entry ca- pacity by up to 30 % and 40 %, respectively. ANOVA tests confirmed the statistical significance of these findings (p < 0.0001).
By providing a more precise estimation of roundabout entry capacity that accounts for the non-linear effects of VRUs, the refined model supports the development of transportation sys- tems that prioritize sustainable mobility. These findings underscore the critical need to inte- grate VRUs into capacity assessments to inform design modifications that promote safe and efficient multimodal transportation. Such integration facilitates the reduction of vehicular con- gestion and emissions, contributing to improved air quality and urban livability, aligning with broader environmental objectives in sustainable urban development.
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