力、扭矩和能量的测量方法都是常用的，并且应该产生相同的测试结果。由于转向、牵引力和非稳态轮胎操作的影响仍处于研究阶段，建议的实践中不包括这些影响。正在开发将实验室数据与道路状况相匹配的方法。

The force, torque, and energy methods of measurement are all in common use and should yield the same test results. Effects of steering, traction, and non steady-state tire operations are excluded from the recommended practice because they are still in the research stage. Methods of correcting laboratory data to road conditions are being developed.