Reference

Hi-vis Class 2 and Class 3 are performance classes set by ANSI/ISEA 107-2020, defined by minimum areas of fluorescent background and retroreflective material, and the gap is decided by traffic speed and exposure. This guide covers the class areas, garment Types O/R/P, Class E items, and a worked example of picking a class by jobsite.

OSHA has no standalone high-visibility clothing standard; it requires hi-vis in specific contexts and otherwise enforces through the General Duty Clause and 1910.132 hazard assessment. This distinction trips up safety managers. This guide covers OSHA's construction rules, the MUTCD/ANSI 107 highway requirement, and a worked jobsite example.