1.1 该试验方法包括使用静态水平仪测量行驶表面的纵向轮廓，以获得道路粗糙度指数。该试验方法适用于传统地面车辆行驶的所有表面类型，包括已铺路面和未铺路面。 1.2 相对于其他测量纵向轮廓的方法而言，该测试方法是劳动密集型的，主要用于( 1. )验证其他剖面测量方法，以及( 2. )校准响应型粗糙度测量系统。 注1: 当为了验证其他剖面测量方法或校准响应型粗糙度测量系统而使用静态水平测量道路粗糙度时，应评估静态水平测量过程，以确保测量结果在 表1 。建议在距离水平面的不同距离处标记几个位置，并按顺序对这些位置进行多次测量，以确定读数是否在要求的分辨率内。风、杆与水平面之间的距离、表面纹理和杆的定位都会对高程测量的可重复性产生重大影响。真实海拔的任何变化都将主要影响偏差，如中所述 10.2 为了确定随机变化的影响，可以将随机变化添加到现有的简档中，并且重新计算IRI以确定变化的影响。 1.3 本试验方法描述了一种特定类型的粗糙度指数所需的计算，即国际粗糙度指数（IRI）中使用的车辆模拟。 此外，用这种测试方法获得的轮廓可以进行处理，以获得其他粗糙度测量值。 1.4 该测试方法包括两个准确度级别，可根据需要进行选择。更精确的，指定为1级，将粗糙度指数的测量误差降低到小于2 %的真实值。第二类被指定为2类，涉及的错误小于5 %. 1.5 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 该试验方法提供了一种使用通用设备获得标准粗糙度指数的方法。这种特殊的测试方法简单但劳动密集，最适合为有限数量的测试点建立参考粗糙度水平。 4.2 使用该试验方法测量粗糙度的试验场地可用于校准响应型测量系统（见试验方法 E1082 )。 4.3 这些位置也可用于验证其他剖面测量系统的正确操作，并确定其他剖面测量体系的精度水平（见试验方法 E950/E950M )。

1.1 This test method covers the measurement of a longitudinal profile of a travelled surface using a static level for the purpose of obtaining a road roughness index. This test method is suitable for all surface types that are travelled by conventional ground vehicles, including paved and unpaved roads. 1.2 This test method is labor intensive with respect to other means for measuring longitudinal profile, and is used mainly for ( 1 ) validating other profile measuring methods, and ( 2 ) calibrating response-type roughness measuring systems. Note 1: When measuring road roughness with a static level for the purposes of validating other profile measuring methods or calibrating response-type roughness measuring systems, the static level measurement process should be evaluated to ensure the measurements are within the resolution required in Table 1 . It is recommended that several locations be marked at various distances from the level and these locations be measured in sequence several times to establish if the readings stay within the resolution required. Wind, distance between the rod and the level, surface texture, and positioning of the rod all have significant impact on the repeatability of the elevation measurements. Any variation from the true elevations will primarily affect the bias as explained in 10.2 . To determine the effect of random variations, random variations can be added to an existing profile and the IRI recalculated to determine the impact of the variations. 1.3 This test method describes the computation required for one particular type of roughness index, the vehicle simulation used in the International Roughness Index (IRI). Additionally, the profile obtained with this test method can be processed to obtain other roughness measures. 1.4 This test method includes two levels of accuracy that can be chosen according to need. The more accurate, designated as Class 1, reduces the measurement error of the roughness index to less than 2 % of the true value of the index. The second, designated as Class 2, involves errors less than 5 %. 1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This test method provides a means for obtaining a standard roughness index using generic equipment. This particular test method is simple but labor intensive, and is most appropriate for establishing reference roughness levels for a limited number of test sites. 4.2 Test sites whose roughness is measured with this test method can be used to calibrate response-type measuring systems (see Test Method E1082 ). 4.3 Such sites can also be used to verify proper operation of other profile measuring systems, and to establish accuracy levels for other profile measuring systems (see Test Method E950/E950M ).