路面的平整度(也称为不平度)是影响路面使用质量最重要的因素,是路面工程施工质最控制和养护维修中最重要的技术指标之一。随着公路改进、路面等级提高、行车速度加快以及货物组成的变化,路面平整度越来越受重视。长期以来,国内道路工程中沿用三米直尺抽测的方法来评价路面平整度状况,虽方法简便但测定点数少且速度慢。近年来北京、西安、上海、锦州等地有关单位先后研制了CP型、XLPY型、LPY型和CPJ型等 Pavement roughness (also known as roughness) is the most important factor affecting the quality of pavement, pavement construction is one of the most important quality control and maintenance of technical indicators. With the improvement of roads, the improvement of pavement level, the speeding up of vehicles and the changes of the composition of goods, pavement smoothness is paid more and more attention. For a long time, three-meter ruler test has been adopted in road engineering in our country to evaluate the smoothness of pavement. Although the method is simple, the measurement points are few and the speed is slow. In recent years, Beijing, Xi’an, Shanghai, Jinzhou and other relevant units have developed CP type, XLPY type, LPY type and CPJ type