杆和水平仪可用于精确测量路面轮廓。配置文件数据 可通过计算粗糙度指数来评估路面的粗糙度，如 国际粗糙度指数（IRI）或用于评估土壤冻胀或膨胀等影响。 在计算粗糙度指数时，只计算相对高程，而不计算绝对高程 需要。本标准实施规程中的指南可适用于常规测量设备 例如光学水准仪和刻度尺，需要手动记录读数，如 以及能够自动存储测量数据的自动化设备。

The rod and level can be used to accurately measure the profile of a pavement. The profile data can be used to evaluate the roughness of the pavement by computing a roughness index such as the International Roughness Index (IRI) or to evaluate effects such as frost heave or swelling of soils. In computing roughness indices, only the relative elevations and not the absolute elevations are needed. The guidelines in this standard practice can be applied to conventional survey equipment such as an optical level and graduated staff, which require the readings to be manually recorded, as well as automated equipment that is capable of automatically storing the measured data.