AASHTO T 257 – Standard Method of Test for Instrumental Photometric Measurements of Retroreflective Materials and Retroreflective Devices
This standard covers procedures for instrumental determinations of photometric characteristics of retroreflective materials and retroreflective devices.
This method describes procedures used to measure photometric quantities that relate to the visual perception of retroreflected light. The most significant usage is in the relation of the nighttime vehicle headlamps, retroreflector, and driver’s eye geometry.
Product Details
Published:
2018
Number of Pages:
23
File Size:
1 file , 790 KB
Product Code(s):
T257-96-UL, T257-96-UL, T257-96-UL
Note:
This product is unavailable in Ukraine, Russia, Belarus
