ISO 14793:2011规定了测定重型商用车、重型商用车组合、客车和铰接式客车瞬态响应性能的试验方法，如ISO 3833中对最大重量超过3.5 t的卡车和拖车以及最大重量超过5 t的客车的定义，以及UNECE（联合国欧洲经济委员会）和EC车辆分类M3、N2、N3类的定义，O3和O4。

ISO 14793:2011 specifies test methods for determining the transient response behaviour of heavy commercial vehicles, heavy commercial vehicle combinations, buses and articulated buses, as defined in ISO 3833 for trucks and trailers above 3,5 t and buses above 5 t maximum weight, and in UNECE (United Nations Economic Commission for Europe) and EC vehicle classification, categories M3, N2, N3, O3 and O4.