ASTM E1709-09 Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometer at 0.2 Degree Observation Angle
ASTM E1709-09 test method is used to perform measurement related to the brightness of retroreflective traffic signs approximately facing the driver at night time by using a mid-sized automobile equipment with tungsten filament headlights at about 200 m distance. The quality of the traffic signs as to material used, age, and wear pattern will affect the coefficient of retroreflection. These conditions are observed and noted by the user.
Average 30% Cost