安全车距是指后方车辆为了避免与前方车辆发生意外碰撞而在行驶中与前车所保持的必要间隔距离。保持安全车距是防止追尾事故最直接、最有效、最广泛和最根本的方法。
Firstly, the subsection of the system and its function diagram was described. On the base of the automobile brake process analysis, the expressway automobile safety distance calculation model is set up.
首先建立了系统分工与任务框图；通过对车辆制动过程的分析，建立了高速公路实用安全车距计算模型；通过对比分析，进行了测距方法的探讨并确定了系统所用测距方法。
参考来源 - 高速公路追尾碰撞预防报警系统开发研究及其主控程序设计This paper has discussed two aspects concerning the following mode of vehicle ACC, one is the safe distance of the following mode, the other is the control modeling of this mode.
本文讨论了汽车自适应巡航控制跟随模式的两个问题，一是跟随模式安全车距的确定，二是跟随模式控制模型的建立。
参考来源 - 汽车自适应巡航控制跟随模式研究Firstly, the subsection of the system and its function diagram was described. On the base of the automobile brake process analysis, the expressway automobile safety distance calculation model is set up.
首先建立了系统分工与任务框图；通过对车辆制动过程的分析，建立了高速公路实用安全车距计算模型；通过对比分析，进行了测距方法的探讨并确定了系统所用测距方法。
参考来源 - 高速公路追尾碰撞预防报警系统开发研究及其主控程序设计·2,447,543篇论文数据，部分数据来源于NoteExpress
本文结合前碰撞避免系统(FCAS)的研究成果，提出了一种新的安全车距算法。
This paper proposes a new method to calculate the safe distance based on the results of frontal collision avoidance system's (FCAS) research.
交通警察提醒司机，当接近交通信号灯是要注意道路，并保持与前面车辆的安全车距。
Traffic police are reminding drivers to focus on the road and maintain a safe distance from vehicles in front of them and to slow down when approaching traffic lights.
克拉克远远地开在前面，已保持了一段足够长的安全车距，他于是放慢车速，开始定速巡航。
Out in front, Clarke had built up such a sizeable safety margin that he eased the pace and started cruising.
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