Empirical study of bicycle traffic characteristics relevant for microscopic simulation

Guillermo Pérez Castro , Fredrik Johansson , Johan Olstam
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Abstract

Studies of bicycle traffic characteristics are essential for understanding bicyclist behavior and developing suitable microscopic models for traffic simulation. Based on empirical data on real-world bicycle traffic, obtained through video-based data collection techniques, we describe characteristics of free-riding, following, and overtaking that facilitate the simulation of bidirectional bicycle traffic. In total, we analyze data from 195 605 bicyclists across seven bicycle paths in Sweden, with five located in Stockholm and two in Gothenburg. The analysis reveals multimodal distributions of speed and lateral position due to the distinct preferences of bicyclists that vary according to the type of bicycle used. Moreover, speeds are generally highest during morning rush hours at the locations under investigation. Based on wind measurements, we conclude that there is no statistically significant effect on mean free speed from wind speeds in the range of ±3 m/s. The distribution of speed differences between bicyclists at overtakings indicates a broad range of speed disparities among bicyclists, and is significantly influenced by infrastructure design. Furthermore, infrastructure design (path width, horizontal alignment, and presence of fixed objects along the edge) and traffic volumes significantly lateral positioning. Our results demonstrate the inherent heterogeneity in the characteristics of bicyclists, underscoring the need to advance modeling to incorporate these distinct characteristics into microscopic traffic simulation.
自行车交通特性的研究对于理解骑自行车者的行为和建立合适的微观交通模拟模型至关重要。基于基于视频的数据采集技术获得的真实世界自行车交通的经验数据,我们描述了免费骑行、跟随和超车的特征,便于模拟双向自行车交通。我们总共分析了瑞典七条自行车道上195605名骑自行车者的数据,其中五条位于斯德哥尔摩,两条位于哥德堡。该分析揭示了速度和横向位置的多模态分布,这是由于骑自行车的人的不同偏好所导致的,这种偏好因所使用的自行车类型而异。此外,受调查地点的车速一般在早高峰时段最高。根据风速测量,我们得出结论,风速在±3 m/s范围内对平均自由速度没有统计学上显著的影响。超车时骑自行车者的速度差异分布表明骑自行车者之间的速度差异范围较大,且受基础设施设计的显著影响。此外,基础设施设计(道路宽度、水平路线和边缘固定物体的存在)和交通量显著地侧向定位。我们的研究结果证明了骑自行车者特征的内在异质性,强调了将这些不同特征纳入微观交通模拟的建模的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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