High visibility apparel meeting the required standards falls into one of three classes. The classes are determined according to the risk.

Class 1 garments are worn when workers are well separated from traffic, and the nearby vehicles and equipment are traveling at speeds less than 40km/h. Some situations may be parking lot attendants, shopping cart retrievers, warehouse workers, roadside or pavement maintenance workers and delivery vehicle drivers.

Class 2 garments are worn for workers who are on or near roadways. The traffic may be traveling at speeds between 40 and 80km/h. Some situations may be roadway construction workers, utility workers, survey crews, railway workers, school crossing guards, high-volume parking or tollgate personnel, airport baggage handlers/ground crews, emergency response personnel, law enforcement personnel, and accident site investigators.

Class 3 garments are worn for workers in high risk situations and allow them to be seen from a minimum distance of 300 metres. These are worn when traffic speeds exceed 80km/h. Some situations may be roadway construction workers, utility workers, survey crews, and emergency response personnel.

Note: Check with Transit NZ if you're unsure of the requirements for your situation.