ISO 3450:2011规定了轮式和高速橡胶履带式土方机械行车、辅助和驻车制动系统的最低性能要求和试验程序，以便对这些制动系统进行统一评估。 本标准适用于以下在工地、采矿或公共道路上行驶的土方机械:ISO 6165中定义的自行式橡胶轮胎土方机械；ISO 6165和ISO 8811中定义的自行式压路机和填埋压实机；ISO 7133中定义的自行式铲运机；ISO 6165中定义的遥控机器，轮式或橡胶履带；带橡胶轮胎的衍生土方机械；带橡胶履带且最大机器速度大于或等于20 km/h的土方机械。 它不适用于行人控制的土方机械（见ISO 17063）或带有钢或橡胶履带的履带式土方机械，其行驶速度小于20 km/h（见ISO 10265）。 虽然专门制造的地下采矿机不在ISO 3450:2011的范围内，但其规定通常适用于附件中给出的经过一些制动性能修改和添加的机器。

ISO 3450:2011 specifies minimum performance requirements and test procedures for the service, secondary and parking brake systems of wheeled and high-speed rubber-tracked earth-moving machines, for the uniform assessment of those brake systems. It is applicable to the following earth-moving machinery, operating on work sites or in mining, or travelling on public roads: self-propelled, rubber-tyred earth-moving machines, as defined in ISO 6165; self-propelled rollers and landfill compactors, as defined in ISO 6165 and ISO 8811; self-propelled scrapers, as defined in ISO 7133; remote-control machines, as defined in ISO 6165, wheeled or rubber-tracked; derivative earth-moving machines with rubber tyres; earth-moving machines with rubber tracks and a maximum machine speed greater than or equal to 20 km/h. It is not applicable to pedestrian-controlled earth-moving machinery (see ISO 17063) or crawler earth-moving machines with steel or rubber tracks that travel at less than 20 km/h (see ISO 10265). While purpose-built underground mining machines are not within the scope of ISO 3450:2011, its provisions can generally be applied to those machines with some braking performance modifications and additions, given in an annex.