Sternlund Simon, Strandroth Johan, Rizzi Matteo, Lie Anders, Tingvall Claes
a Swedish Transport Administration , Borlänge , Sweden.
b Chalmers University of Technology , Göteborg , Sweden.
Traffic Inj Prev. 2017 Feb 17;18(2):225-229. doi: 10.1080/15389588.2016.1230672. Epub 2016 Sep 13.
The objective of this study was to estimate the safety benefits of in vehicle lane departure warning (LDW) and lane keeping aid (LKA) systems in reducing relevant real-world passenger car injury crashes.
The study used an induced exposure method, where LDW/LKA-sensitive and nonsensitive crashes were compared for Volvo passenger cars equipped with and without LDW/LKA systems. These crashes were matched by car make, model, model year, and technical equipment; that is, low-speed autonomous emergency braking (AEB) called City Safety (CS). The data were extracted from the Swedish Traffic Accident Data Acquisition database (STRADA) and consisted of 1,853 driver injury crashes that involved 146 LDW-equipped cars, 11 LKA-equipped cars, and 1,696 cars without LDW/LKA systems.
The analysis showed a positive effect of the LDW/LKA systems in reducing lane departure crashes. The LDW/LKA systems were estimated to reduce head-on and single-vehicle injury crashes on Swedish roads with speed limits between 70 and 120 km/h and with dry or wet road surfaces (i.e., not covered by ice or snow) by 53% with a lower limit of 11% (95% confidence interval [CI]). This reduction corresponded to a reduction of 30% with a lower limit of 6% (95% CI) for all head-on and single-vehicle driver injury crashes (including all speed limits and all road surface conditions).
LDW/LKA systems were estimated to lower the driver injury risk in crash types that the systems are designed to prevent; that is, head-on and single-vehicle crashes. Though these are important findings, they were based on a small data set. Therefore, further research is desirable to evaluate the effectiveness of LDW/LKA systems under real-world conditions and to differentiate the effectiveness between technical solutions (i.e., LDW and LKA) proposed by different manufacturers.
本研究的目的是评估车内车道偏离预警（LDW）和车道保持辅助（LKA）系统在减少现实世界中乘用车相关伤害碰撞事故方面的安全效益。
该研究采用诱导暴露法，对配备和未配备LDW/LKA系统的沃尔沃乘用车的LDW/LKA敏感和不敏感碰撞事故进行比较。这些碰撞事故按汽车品牌、型号、车型年份和技术设备进行匹配；即配备低速自动紧急制动（AEB）功能的城市安全（CS）系统。数据从瑞典交通事故数据采集数据库（STRADA）中提取，包括1853起涉及驾驶员受伤的碰撞事故，其中涉及146辆配备LDW的汽车、11辆配备LKA的汽车以及1696辆未配备LDW/LKA系统的汽车。
分析表明LDW/LKA系统在减少车道偏离碰撞事故方面具有积极作用。据估计，LDW/LKA系统可使瑞典道路上速度限制在70至120公里/小时且路面干燥或潮湿（即未被冰雪覆盖）的正面碰撞和单车伤害碰撞事故减少53%，下限为11%（95%置信区间[CI]）。对于所有正面碰撞和单车驾驶员伤害碰撞事故（包括所有速度限制和所有路面状况），这种减少对应于减少30%，下限为6%（95%CI）。
据估计，LDW/LKA系统可降低系统旨在预防的碰撞类型（即正面碰撞和单车碰撞）中的驾驶员受伤风险。尽管这些是重要发现，但它们基于一个小数据集。因此，需要进一步研究以评估LDW/LKA系统在现实世界条件下的有效性，并区分不同制造商提出的技术解决方案（即LDW和LKA）之间的有效性。
