The standard classifies High-Visibility Safety Apparel (HVSA) as Performance Class 1, 2 or 3, depending on the amount of visible background and retroreflective material. These Performance Classes give users a way to specify HVSA that is appropriate for the work environment and hazards. The 2015 edition also establishes three types of garments:
- Type O (off-road), for non-roadway use, where workers are not exposed to high traffic or temporary control zones. Type O HVSA is Performance Class 1.
- Type R (roadway), for use where workers are exposed to traffic from public access highway rights-of-way or roadway temporary control zones. Type R HVSA may be Performance Class 2 or 3.
- Type P (public safety) for emergency and incident responders and law enforcement personnel who are exposed to struck-by hazards in roadway or off-road work environments. These garments provide additional options addressing competing hazards or the need for access to special equipment. Type P HVSA may be Performance Class 2 or 3