Vehicle-induced lateral aerodynamic loads on cyclists during overtaking were measured in a field campaign. The study comprised five common vehicle types in combination with four common cyclist types at overtaking maneuvers with vehicle velocities from 30 to 100 km/h and overtaking distances from 0.5 to 2.0 m. The obtained load time histories show distinct phases with the lateral load acting to push the cyclist away followed by a phase with the lateral load acting to pull the cyclist towards the vehicle. Key characteristics of these phases are a peak pressure and a peak suction load and their separation in time. Mathematical relations for the key characteristics based on vehicle velocity, overtaking distance, and on readily available vehicle and cyclist basic geometry parameters are presented. Finally, the so called peak-to-peak load rate, a measure which combines the magnitude of the load direction change from the peak pressure to the peak suction load and its celerity is introduced. It is argued that the peak-to-peak load rate can serve as a quantitative measure to assess cyclist safety or at least be supportive in this regard.

在现场活动中测量了超车时车辆引起的骑自行车者的横向空气动力载荷。该研究包括五种常见车辆类型以及四种常见自行车类型的超车操作，车速为 30 至 100 km/h，超车距离为 0.5 至 2.0 m。获得的负载时间历史显示出不同的阶段，其中横向负载将骑车人推开，随后是侧向负载将骑车人拉向车辆的阶段。这些阶段的关键特征是峰值压力和峰值吸入负载以及它们的及时分离。提出了基于车辆速度、超车距离以及容易获得的车辆和骑车人基本几何参数的关键特性的数学关系。最后，引入了所谓的峰峰值负载率，它结合了从峰值压力到峰值吸力负载的负载方向变化的大小及其速度。有人认为，峰峰值负载率可以作为评估骑车人安全性的定量措施，或者至少在这方面提供支持。