Full Description

1.1 This test method covers measurement of the retroreflective properties of horizontal pavement marking materials containing retroreflecting spheres, 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.

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

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