ISO 20918:2007描述了一种通过滚筒制动测试仪评估具有气动制动系统的重型商用车辆组合的制动阈值的方法。 ISO 20918:2007描述了车间和车库的程序，并提供了 用于机动车辆和拖车的系统阈值压力的推荐压力范围，以及 确定系统阈值压力的推荐实践。 ISO 20918:2007既没有涵盖高压兼容性，包括衬里/衬垫和滚筒/圆盘之间摩擦系数的控制，也没有涵盖动态影响。ISO 20918:2007不适用于型式批准。

ISO 20918:2007 describes a method to evaluate the braking threshold of heavy commercial vehicle combinations with pneumatic braking systems, by means of a roller brake tester. ISO 20918:2007 describes procedures for workshops and garages and provides

• a recommended pressure range of the system threshold pressure for motor vehicles and trailers, and
• a recommended practice for determining the system threshold pressure.

ISO 20918:2007 covers neither high-pressure compatibility, including the control of the coefficient of friction between lining/pad and drum/disc, nor dynamic influences. ISO 20918:2007 is not for use at Type Approval.