Lucci Cosimo, Allen Trevor, Baldanzini Niccolò, Savino Giovanni
Department of Industrial Engineering, University of Florence, Florence, Italy.
Monash University Accident Research Centre, Monash University, Clayton, Victoria, Australia.
Traffic Inj Prev. 2022;23(sup1):S56-S61. doi: 10.1080/15389588.2022.2106370. Epub 2022 Aug 26.
Safely negotiating curves with a powered-two-wheeler (PTW) requires a high level of skill, and a significant proportion of PTW crashes have a curve involvement. This study aimed to estimate the applicability, potential benefits and feasibility of novel Motorcycle Curve Assist (MCA). The system is designed to operate an emergency control of the speed of a motorcycle approaching a bend at an inappropriate speed.
First, the MCA system intervention was defined. Second, the applicability of the system and an estimate of its potential benefits was performed based on a PTW crash database. Motorcyclists' injury risk estimates, MCA working parameters and timing of intervention were employed to estimate the potential injury reduction of applicable crash types. Third, a field test campaign involving 29 common riders as participants was conducted to investigate the real-world applicability and acceptability among end-users of the system deployment in one relevant riding condition adopting a range of parameters of intervention.
In the crash database, 23% of cases had curve involvement and after detailed analysis, 14% resulted to be suitable for MCA (60% of cases with curve involvement). The potential relative injury risk reduction considering only the benefits due to crash speed reduction ranged from 3-9% for MAIS2+ to 9-27% for MAIS3+ injuries. Field tests were performed in corners approached at an average speed of 28.7 km/h and an average lean angle of 20°. The system provided a mean deceleration of 0.33 g reached with a fade-in jerk of 1.73 g/s, for an average total duration of 0.59 s. For the field test component, participants reported good controllability of the system, with no incipient loss of control recorded nor reported by participants.
The proposed approach for MCA implementation showed considerable potential benefits in terms of injury reduction. The intervention with the defined working parameters was considered feasible by a sample of end-users. When integrated with an intervention logic capable of predicting emergency situations while approaching curves, MCA will be a technology capable of assisting PTW riders in conditions where other available active safety systems do not.
驾驶电动两轮车（PTW）安全通过弯道需要较高的技能水平，并且相当一部分PTW碰撞事故都与弯道有关。本研究旨在评估新型摩托车弯道辅助系统（MCA）的适用性、潜在益处和可行性。该系统旨在对以不适当速度接近弯道的摩托车进行速度紧急控制。
首先，定义MCA系统干预措施。其次，基于PTW碰撞数据库评估系统的适用性及其潜在益处。利用摩托车手的受伤风险估计、MCA工作参数和干预时机来估计适用碰撞类型的潜在伤害减少情况。第三，开展了一项实地测试活动，29名普通骑手参与其中，在一种相关骑行条件下采用一系列干预参数，以研究系统部署在终端用户中的实际适用性和可接受性。
在碰撞数据库中，23%的案例与弯道有关，经过详细分析，14%的案例适合MCA（占弯道相关案例的60%）。仅考虑因碰撞速度降低带来的益处，MAIS2+损伤的潜在相对伤害风险降低范围为3 - 9%，MAIS3+损伤的潜在相对伤害风险降低范围为9 - 27%。实地测试在平均速度为28.7千米/小时、平均倾斜角度为20°的弯道进行。系统平均减速度为0.33g，渐强加加速度为1.73g/s，平均总时长为0.59秒。对于实地测试部分，参与者报告称系统可控性良好，没有参与者记录或报告出现初期失控情况。
所提出的MCA实施方法在减少伤害方面显示出相当大的潜在益处。终端用户样本认为采用定义的工作参数进行干预是可行的。当与能够在接近弯道时预测紧急情况的干预逻辑相结合时，MCA将成为一种能够在其他现有主动安全系统无法发挥作用的情况下协助PTW骑手的技术。
