The classes are defined by the minimum amount of background and retro-reflective material, the configuration of the retro-reflective material, as well as other technical garment design requirements. A wearer shall select which class they wear based upon their own risk assessment.
ANSI CLASS 1 – For use by workers who are well separated from traffic and working in areas where vehicle and/or equipment speeds do not exceed 25 mph. Workers who can benefit from this class of garments include those directing parking operations, retrieving shopping carts from parking areas, maintaining sidewalks, making deliveries from vehicles, and working in warehouses where motorized equipment is present.
ANSI CLASS 2 – For workers who are on or near roadways, are exposed to traffic traveling at speeds in excess of 25 mph, and are in situations where complex visual backgrounds may be present. Examples of workers benefiting from this class of garments are roadway construction workers, utility workers, survey crews, crossing guards, tollgate personnel, airport baggage handlers, first responders, and law enforcement personnel.
ANSI CLASS 3 – These are High Visibility garments for workers in the highest-risk situations, who need to be visible through a full range of body motions from a minimum distance of 1280 feet, and who are exposed to traffic traveling at significantly high speeds. Workers who can benefit from this class of garments include highway maintenance and construction crews, utility workers, tow truck operators, survey crews, flaggers, and emergency response personnel.