1.1 本试验方法包括使用便携式反光仪测量含有反光珠（如交通条纹和表面符号）的水平路面标线材料的反光性能，该反光仪可放置在道路轮廓上，以测量规定几何形状下的反光。 注1: 对珠子基材料的限制是为了确保足够渐进的光学响应函数（从源孔径点到接收器孔径点），以允许大尺寸的仪器源和接收器孔径。 1.2 反向反射计的入口和观察角度会影响读数。根据欧洲标准化委员会（CEN）的规定，入口和观察角度应为88。 分别为76°和1.05°。 1.3 本试验方法旨在用于路面标线的现场测量，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 条纹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、使用年限和磨损模式。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，较大的 R L 对应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 对于给定的观察距离，测量 R L 由具有与该视距对应的几何形状的回复反射计制成，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，前照灯安装高度为0。 条纹正上方65米，条纹正上方1.2米的眼高。 5.6 用户应负责使用具有规定观察角和入射角的仪器。

1.1 This test method covers measurement of the retroreflective properties of horizontal pavement marking materials containing retroreflecting beads, such as traffic stripes and surface symbols, using a portable retroreflectometer that can be placed on the road delineation to measure the retroreflection at a prescribed geometry. Note 1: The restriction to bead based materials is for the purpose of ensuring a sufficiently gradual optical response function (from points of the source aperture to points of the receiver aperture) to allow generous sized instrument source and receiver apertures. 1.2 The entrance and observation angles of the retroreflectometer affect the readings. As specified by the European Committee for Standardization (CEN), 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 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 is determined by the coefficient of retroreflected luminance, R L , 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, larger values of R L correspond to higher levels of visual performance. 5.3 Retroreflectivity 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 R L made with a retroreflectometer having a geometry corresponding to that viewing distance are a good indicator of the visual ranking of material measured. 5.5 As specified by CEN, the measurement geometry of the instrument 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 stripe. 5.6 It shall be the responsibility of the user to employ an instrument having the specified observation and entrance angles.