1.1 本试验方法涵盖使用便携式反射计在特定观察方向上测量水平路面标线（如交通条纹和表面符号）和路面表面漫射照明下的亮度系数。 注1: 漫射照明下的亮度系数是在日光或道路照明下，水平路面标线和路面在特定观察方向上的反射。漫射照明近似于来自阴天的日光照明，道路照明是路面上位置的平均值。 1.2 反射计的同视角会影响读数。根据欧洲标准化委员会（CEN）的规定，同视角应为2.29°。 1.3 本试验方法旨在用于路面标线和路面表面的现场测量，但可用于在现场放置标线材料之前测量样品板上材料的性能。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 1.5 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 在日光或道路照明下，条纹的可见度质量由漫射照明下的亮度系数Qd决定，并取决于使用的材料、年龄和磨损模式。用户应遵守并记录这些条件。 5.2 在相同的照明和观看条件下，量子点的级别越高，对应的亮度级别越高。 5.3 路面（道路）标线的反射率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 对于给定的观察距离，使用具有与该距离对应的几何形状的反射计进行的量子点测量是测量材料视觉排名的良好指示器。 5.5 根据欧洲标准化委员会的规定，仪器的测量几何形状基于30米的视距和1米的眼睛高度。 2米。 5.6 用户应负责使用具有指定同视角的仪器。

1.1 This test method covers measurement of the luminance coefficient under diffuse illumination of horizontal pavement markings, such as traffic stripes and surface symbols, and pavement surfaces, in a particular viewing direction using a portable reflectometer. Note 1: The luminance coefficient under diffuse illumination is a measure of the reflection of horizontal pavement markings and pavement surfaces in a particular viewing direction in daylight or under road lighting. Diffuse illumination approximates daylight illumination from the overcast sky, and road lighting as an average of locations on the pavement surface. 1.2 The co-viewing angle of the reflectometer affects the readings. As specified by the European Committee for Standardization (CEN), the co-viewing angle shall be 2.29°. 1.3 This test method is intended to be used for field measurement of pavement markings and pavement surfaces but may be used to measure the performance of materials on sample panels before placing the marking material in the field. 1.4 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. 1.5 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 stripe for visibility in daylight or under road lighting is determined by the luminance coefficient under diffuse illumination, Qd, and depends on the materials used, age, and wear pattern. These conditions shall be observed and noted by the user. 5.2 Under the same conditions of illumination and viewing, higher levels of Qd correspond to higher levels of lightness. 5.3 Reflectivity of pavement (road) markings degrade with traffic wear and require periodic measurement to ensure that sufficient line visibility is provided to drivers. 5.4 For a given viewing distance, measurements of Qd made with a reflectometer having a geometry corresponding to that distance are a good indicator of the visual ranking of material measured. 5.5 specified by CEN, the measurement geometry of the instrument is based on a viewing distance of 30 m and an eye height of 1.2 m. 5.6 It shall be the responsibility of the user to employ an instrument having the specified co-viewing angle.