1.1本规程涵盖了便携式反光计的选择和使用，用于在规定的几何形状下测量包含玻璃球的水平路面标线材料（如交通条纹和表面符号）的反光特性。 1.2回复反射计中提供的入射角和观察角对测试结果有很大影响，因此在选择仪器时必须重点考虑。第5节提供了有关仪器几何形状和观察几何形状之间关系的信息。 表1提供了有关查看几何图形的信息。图1给出了观察几何形状和反向反射亮度系数RL之间关系的信息。 1.3本规程旨在用于选择便携式回复反射计进行路面标线的现场测量，但也可用于选择便携式回复反射计，以在现场放置标线材料之前测量样品板上材料的性能。 1.4本标准无意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。

1.1 This practice covers the selection and use of a portable retroreflectometers for the measurement at a prescribed geometry of the retroreflective properties of horizontal pavement marking materials containing glass spheres, such as traffic stripes and surface symbols. 1.2 The entrance and observation angles provided in the retroreflectometer greatly affect the test results and must be a major consideration in the selection of the instrument. Information on the relationship between instrument geometry and viewing geometry is provided in Section 5. Information on viewing geometry is provided in Table 1. Information on the relationship between viewing geometry and coefficient of retroreflected luminance, RL is given in fig. 1. 1.3 This practice is intended to be used for selection of portable retroreflectrometers for field measurement of pavement markings but may also be used to select portable retroreflectometers 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 and health practices and determine the applicability of regulatory limitations prior to use.