1.1 本试验方法包括使用可在交通速度下操作的移动式反光计装置测量包含反光光学元件（如交通条纹和表面符号）的水平路面标线材料的反光特性，该装置安装在车辆上，以测量规定几何形状下的反光。 1.2 MRU的入口和观察角度会影响读数。按照欧洲标准化委员会（CEN）和试验方法的规定 E1710 ，入射角和观察角应分别为88.76°和1.05°。 1.3 本试验方法旨在用于交通速度下路面标线的现场测量。 1.4 本试验方法旨在用于测量干燥路面标线的反光率。 1.5 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.6 本标准无意解决MRU及其使用的监管和安全规定。制造商有责任满足监管标准。本标准的用户有责任在使用前制定适当的安全和健康实践，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（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 路面标线的质量由反向反射亮度系数决定， R L ，并取决于使用的材料、年龄、磨损模式、应用方法、路面表面和其他条件。 5.2 在相同的照明和观看条件下，较大的 R L 对应于在黑暗条件下更高水平的视觉表现。 5.3 路面（道路）标线的反光性随着交通磨损而降低，需要定期测量，以确保为驾驶员提供足够的线路可见性。 5.4 MRU用于测量 R L 以交通速度行驶时的道路标线值，可用于比便携式仪器更长的路段，以及在使用便携式仪器需要广泛预防的情况下，尤其是在高速公路上。 5.5 MRU的测量几何形状基于30米的视距，前照灯安装高度为0.65 根据CEN 1436和试验方法，条纹正上方1.2 m，标记正上方1.2 m的眼睛高度 E1710 . 5.6 MRU应根据仪器供应商或制造商的指示进行校准、维护和操作。 5.7 用户应负责使用符合本标准要求规范的MRU。

1.1 This test method covers measurement of the retroreflective properties of horizontal pavement marking materials containing retroreflecting optics, such as traffic stripes and surface symbols, using a mobile retroreflectometer unit that can be operated at traffic speed, mounted on a vehicle to measure the retroreflection at a prescribed geometry. 1.2 The entrance and observation angles of the MRU affect the readings. As specified by the European Committee for Standardization (CEN) and in Test Method E1710 , the entrance and observation angles shall be 88.76° and 1.05°, respectively. 1.3 This test method is intended to be used for field measurement of pavement markings at traffic speed. 1.4 This test method is intended to be used for retroreflectivity measurement of dry pavement markings. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.6 This standard does not purport to address regulatory and safety regulations of the MRU and its use. It is the responsibility of the manufacturer to fulfill regulatory standards. It is the responsibility of the user of this standard to establish appropriate safety and health 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 ====== 5.1 The quality of the pavement marking is determined by the coefficient of retroreflected luminance, R L , and depends on the materials used, age, wear pattern, application method, pavements surface, and other conditions. 5.2 Under the same conditions of illumination and viewing, larger values of R L correspond to higher levels of visual performance in dark conditions. 5.3 Retroreflectivity of pavement (road) markings degrades with traffic wear and requires periodic measurement to ensure that sufficient line visibility is provided to drivers. 5.4 MRUs are used to measure R L values of road markings while moving at traffic speed, and can be used for longer stretches of road than portable instruments and in cases where the use of portable instruments require extensive precautions, in particular on motorways. 5.5 The measurement geometry of the MRU is based on a viewing distance of 30 m, a headlight mounting height of 0.65 m directly over the stripe, and an eye height of 1.2 m directly over the marking according to CEN 1436 and Test Method E1710 . 5.6 MRUs are to be calibrated, maintained, and operated according to instructions by the instrument supplier or manufacturer. 5.7 It shall be the responsibility of the user to employ an MRU fulfilling the required specifications in this standard.