High Visibility and Retroreflective Performance
topic
High visibility testing measures retroreflective coefficient of luminous intensity using a calibrated photometer at defined observation and entrance angles, and chromaticity coordinates of fluorescent background materials using spectrophotometry; minimum performance thresholds under EN ISO 20471 define three classes based on total visible area and retroreflective area.
Role
Ensures detection of roadside workers, emergency services, and vehicle operators in low-light conditions by quantifying both daytime fluorescent conspicuity and retroreflective night-time visibility performance of safety garments against injury-prevention effectiveness thresholds.