Standard Test Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometer at a 0.5 Degree Observation Angle

Importancia y uso:

5.1 Measurements made by this test method are related to the night time brightness of retroreflective traffic signs approximately facing the driver of a mid-sized automobile equipped with tungsten filament headlights at about 100 m distance.

5.2 Retroreflective material used on traffic signs degrades with time and requires periodic measurement to ensure that the performance of the retroflection provides adequate safety to the driver.

5.3 The quality of the sign as to material used, age, and wear pattern will have an effect on the coefficient of retroreflection. These conditions need to be observed and noted by the user.

5.4 This test method is not intended for use for the measurement of signs when the instrument entrance and observation angles differ from those specified herein.

Subcomité:

E12.10

Referida por:

E1709-16R22

Volúmen:

06.01

Número ICS:

93.080.40 (Street lighting and related equipment)

Palabras clave:

portable retroreflectometers; retroreflection;