Photometric testing of retro-reflective materials used for highway signing and delineation. Paper prepared for the 7th Conference of the Australian Road Research Board ARRB, Adelaide, 1974.

Photometric instrumentation and testing procedures universally used for measuring the coefficient of (reflex) luminous intensity (CIL) of reflective sheeting and corner-cube delineation devices are discussed. Test results from experimental variation of photometric control parameters are presented.