This document specifies system requirements and test methods for lane change decision aid systems (LCDAS). LCDAS are intended to warn the driver of the subject vehicle against potential collisions with vehicles either to the side or to the rear in the adjacent lanes of the subject vehicle and moving in the same direction as the subject vehicle for lane change manoeuvres. This document addresses LCDAS for use on forward-moving cars, vans and straight trucks.

This document does not address LCDAS for use on motorcycles or articulated vehicles such as tractor/trailer combinations and articulated buses.