1.1 本试验方法涵盖了湿反光的测量( R L )水平路面标线材料的特性，如交通条纹和路面符号，使用便携式回复反射仪，可放置在道路标线上或之前，以测量规定几何形状下的回复反射。 1.2 这种测量湿反光特性的方法( R L )路面标线测量湿恢复条件下的湿回复反射率（参见 图1 ). 图1 测量图示 1.2.1 该测试条件通常存在( 1. )降雨结束后，路面标线仍然潮湿或( 2. )由于标记被露水或湿气弄湿。 1.3 在湿恢复条件下通过本试验获得的反光性能不一定与标记在下雨条件下的表现有关，也就是说，当标记被雨淋时。试验方法 E2832年 定义了在模拟降雨条件下测量路面标线性能的方法。 1.4 本试验方法规定了可根据试验方法测量路面标线的便携式反射计的使用 E1710 . 2. 本试验方法中，反向反射计所需的入射角和观察角通常称为“30米几何形状” 2. 1.5 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.6 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。 1.7 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====== 4.1 路面标线的夜间性能由反向反射亮度系数决定， R L 它是干的还是湿的，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。 4.2 在相同的前照灯照明和驾驶员视野条件下，较大的 R L 对应于相应几何体的更高视觉表现水平。 4.3 路面标线在湿恢复条件下的测量性能用于表征路面标线在潮湿时的性能。 4.4 新安装的路面标线可能具有天然表面张力或脱模剂，以防止产品被水润湿。水会在标记上“滴落”。这种“非湿润”状态通常寿命很短。测试前已在道路上行驶一个月的路面标线通常不会出现这种情况- 润湿现象。( 警告- 在评估路面标线的湿润特性时，这种现象会产生干扰。尝试测量该表面“非湿润”或“水珠”的标记可能会得到更高的值。） 4.5 逆反射， R L 路面（道路）标线的高度会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。 4.6 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。 4.7 按试验方法规定 E1710 ，仪器的测量几何形状基于30米的视距、1.2米的眼睛高度和0.65米的前照灯安装高度（参见 附录X1 ). 4.8 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 the measurement of the wet retroreflective ( R L ) properties of horizontal pavement marking materials, such as traffic stripes and road surface symbols, using a portable retroreflectometer that can be placed on or before the road marking to measure the retroreflection at the prescribed geometry. 1.2 This method of measuring the wet retroreflective properties ( R L ) of pavement markings measures the wet retroreflectivity in a condition of wet recovery (see Fig. 1 ). FIG. 1 Illustration of Measurement 1.2.1 This test condition typically exists ( 1 ) after a rainfall has ended and the pavement markings are still wet or ( 2 ) as the markings are wet from dew or humidity. 1.3 Retroreflective performance obtained with this test in condition of wet recovery does not necessarily relate to how markings perform in conditions of rain, that is, as markings are being rained upon. Test Method E2832 defines a method to measure the performance of pavement markings in conditions of simulated rain. 1.4 This test method specifies the use of portable reflectometers that can measure pavement markings in accordance with Test Method E1710 . 2 The entrance and observation angles required of the retroreflectometer in this test method are commonly referred to as “30 meter geometry.” 2 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 The nighttime performance of pavement markings is determined by the coefficient of retroreflected luminance, R L , be it dry or wet, and depends on the materials used, age, and wear pattern. These conditions shall be observed and noted by the user. 4.2 Under the same conditions of headlight illumination and driver’s viewing, larger values of R L correspond to higher levels of visual performance at corresponding geometry. 4.3 The pavement marking’s measured performance in the condition of wet recovery is used to characterize the performance of the marking on the road when wet. 4.4 Newly installed pavement markings may have a natural surface tension or release agents that prevent wetting of the product by water. The water will tend to “bead up” on the marking. This “non wetting” condition is usually short lived. Pavement markings that have been on the road for one month prior to testing usually do not exhibit this non-wetting phenomenon. ( Warning— This phenomenon produces an interference when assessing the wet characteristics of a pavement marking. Attempts to measure markings with this surface “non-wetting” or “beading” of the water may give higher values.) 4.5 The retroreflectivity, R L , of pavement (road) markings degrades with traffic wear and requires periodic measurement to ensure that sufficient line visibility is provided to drivers. 4.6 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 the material measured. 4.7 As specified by Test Method E1710 , the measurement geometry of the instrument is based on a viewing distance of 30 m, an eye height of 1.2 m and a headlight mounting height of 0.65 m (see Appendix X1 ). 4.8 It shall be the responsibility of the user to employ an instrument having the specified observation and entrance angles.