ISO 17387:2008规定了车道变更决策辅助系统（LCDAS）的系统要求和试验方法。LCDA基本上是为了警告目标车辆的驾驶员，防止与目标车辆侧面和/或后部的车辆发生潜在碰撞，并在换道操纵过程中与目标车辆的方向相同。该标准化解决了在高速公路情况下用于向前行驶的汽车、货车和直行卡车的LCDA问题。

ISO 17387:2008 specifies system requirements and test methods for Lane Change Decision Aid Systems (LCDAS). LCDAS are fundamentally intended to warn the driver of the subject vehicle against potential collisions with vehicles to the side and/or to the rear of the subject vehicle, and moving in the same direction as the subject vehicle during lane change manoeuvres. This standardization addresses LCDAS for use on forward moving cars, vans and straight trucks in highway situations.