ISEC UNIVERSITAS, Alameda das Linhas de Torres 179, 1750-142 Lisboa, Portugal; Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal.
Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal.
J Safety Res. 2014 Jun;49:77-84. doi: 10.1016/j.jsr.2014.02.010. Epub 2014 Apr 24.
The Adaptive Cruise Control is an Advanced Driver Assistance System (ADAS) that allows maintaining given headway and speed, according to settings pre-defined by the users. Despite the potential benefits associated to the utilization of ACC, previous studies warned against negative behavioral adaptations that might occur while driving with the system activated. Unfortunately, up to now, there are no unanimous results about the effects induced by the usage of ACC on speed and time headway to the vehicle in front. Also, few studies were performed including actual users of ACC among the subjects.
This research aimed to investigate the effect of the experience gained with ACC on speed and time headway for a group of users of the system. In addition, it explored the impact of ACC usage on speed and time headway for ACC users and regular drivers.
A matched sample driving simulator study was planned as a two-way (2×2) repeated measures mixed design, with the experience with ACC as between-subjects factor and the driving condition (with ACC and manually) as within-subjects factor.
The results show that the usage of ACC brought a small but not significant reduction of speed and, especially, the maintenance of safer time headways, being the latter result greater for ACC users, probably as a consequence of their experience in using the system.
The usage of ACC did not cause any negative behavioral adaptations to the system regarding speed and time headway.
Based on this research work, the Adaptive Cruise Control showed the potential to improve road safety for what concerns the speed and the time headway maintained by the drivers. The speed of the surrounding traffic and the minimum time headway settable through the ACC seem to have an important effect on the road safety improvement achievable with the system.
自适应巡航控制系统（ACC）是一种高级驾驶员辅助系统（ADAS），可根据用户预先设定的设置保持给定的车距和速度。尽管使用 ACC 具有潜在的好处，但之前的研究警告称，在激活系统驾驶时可能会发生负面的行为适应。不幸的是，到目前为止，对于使用 ACC 对前方车辆的速度和时间间隔所产生的影响，还没有一致的结果。此外，很少有研究将实际使用 ACC 的人员纳入研究对象。
本研究旨在调查 ACC 经验对系统用户的速度和时间间隔的影响。此外，还探讨了 ACC 使用对 ACC 用户和普通驾驶员的速度和时间间隔的影响。
计划采用匹配样本驾驶模拟器研究作为两因素（2×2）重复测量混合设计，以 ACC 经验为组间因素，驾驶条件（带 ACC 和手动）为组内因素。
结果表明，使用 ACC 带来了速度的微小但无统计学意义的降低，特别是保持了更安全的时间间隔，对于 ACC 用户来说，后者的结果更大，可能是由于他们使用系统的经验。
使用 ACC 不会导致对系统的速度和时间间隔产生任何负面的行为适应。
基于这项研究工作，自适应巡航控制系统有望在驾驶员保持的速度和时间间隔方面提高道路安全性。周围交通的速度和通过 ACC 可设定的最小时间间隔对系统可实现的道路安全改善具有重要影响。
