1.1本试验方法涵盖夜间色度坐标的测量( x , y )使用便携式反向反射色度计测量水平路面标线，如交通条纹和表面符号，该色度计可放置在道路轮廓上，以测量规定几何形状下的色度。 1.2回复测辐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 EN 1436）的规定，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色度。 1.4便携式反向反射色度计可以集成反向反射亮度系数R的测量 L 根据测试方法E1710，因此是一个集成的反向反射计/反向反射色度计。 1.5 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1通过三刺激值确定条纹的色度 十、 , Y 和 Z 对于CIE 1931（2°），CIE标准光源A的标准观测器，其被转换为色度坐标( x , y )并显示在CIE 1931中( x , y )-色度图。参考规程E308。 5.2在相同的照明和观看条件下，色度坐标( x , y )表示车辆驾驶员看到的车辆前照灯照明中路面标线的夜间颜色。 5.3路面（道路）标线的色度可能会随着交通磨损而变化，需要定期测量，以确保色度保持在边界内（颜色边界示例见规范D6628）。 5.4根据CEN EN 1436和测试方法E1710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。 65米，眼高1.2米。 5.5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 nighttime chromaticity coordinates ( x , y ) of horizontal pavement markings, such as traffic stripes and surface symbols, using a portable retroreflection colorimeter that can be placed on the road delineation to measure the chromaticity at a prescribed geometry. 1.2 The entrance and observation angles of the retrorecolorimeter affect the readings. As specified by the European Committee for Standardization (CEN EN 1436), 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 chromaticity of materials on sample panels before placing the marking material in the field. 1.4 The portable retroreflection colorimeter may integrate measurement of the coefficient of retroreflected luminance R L in accordance with Test Method E1710 and thus be an integrated retroreflectometer/ retroreflection colorimeter. 1.5 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 The chromaticity of the stripe is determined by means of the tristimulus values X , Y and Z for the CIE 1931 (2°) standard observer for CIE standard illuminant A, which are converted to the chromaticity coordinates ( x , y ) and shown in the CIE 1931 ( x , y )-chromaticity diagram. Refer to Practice E308. 5.2 Under the same conditions of illumination and viewing, the chromaticity coordinates ( x , y ) represent the nighttime color of pavement markings in vehicle headlamp illumination as seen by drivers of the vehicles. 5.3 The chromaticity of pavement (road) markings may change with traffic wear and require periodic measurement to ensure that the chromaticity is maintained within boundaries (see Specification D6628 for examples of color boundaries). 5.4 As specified by CEN EN 1436 and Test Method E1710, the measurement geometry of the instrument is based on a viewing distance of 30 m, a headlamp mounting height of 0.65 m and an eye height of 1.2 m. 5.5 It shall be the responsibility of the user to employ an instrument having the specified observation and entrance angles.