本SAE推荐实践为新卡车、公共汽车和设计用于道路使用并属于以下分类的车辆组合的制动系统的水平道路测试建立了统一的程序: 轻型卡车和公共汽车:6001 10,000磅（2700 4500公斤）gvw 卡车和公共汽车:超过10,000磅（4500公斤）gvw 车辆组合（牵引车重量超过10,000磅（4500公斤））

This SAE Recommended Practice establishes a uniform procedure for the level road test of the brake systems of new trucks, buses, and combination of vehicles designed for roadway use and falling in the following classifications: Light trucks and buses: 6001–10,000 lb (2700–4500 kg) gvw Truck and bus: Over 10,000 lb (4500 kg) gvw Combination of vehicles (towing vehicle over 10,000 lb (4500 kg) gvw)