本SAE推荐规程提供了空气制动单单元卡车、客车和组合车辆的测试程序和说明。制动力分配试验与制动距离变化后的系统仍然合适；然而，本文件中未涉及带有电子控制制动系统的车辆，可能需要在未来加以解决。它还为以下方面提供了建议: a仪器和设备。b车辆准备。c计算制动力分布。

This SAE Recommended Practice provides the test procedure and instructions for air braked single unit trucks, buses, and combination vehicles. Brake force distribution testing with systems post-reduced stopping distance changes is still appropriate; however, vehicles with electronically controlled braking systems are not covered in this document and may need to be addressed in the future. It also provides recommendations for: a Instrumentation and equipment.b Vehicle preparation.c Calculating distribution of brake force.