PERFORMANCE LEVEL 1 (CLASS 1) TYPICAL
SCENARIO A:
For occupational activities that permit the worker:
- Full and undivided attention to approaching traffic
- Plenty of seperation between the pedestrian worker and the conflicting vehicle traffic
- Opitimun visibility in uncomplicated backgrounds where vehicle and moving equipment speeds do not exceed 25 MPH.

PERFORMANCE LEVEL 2 (CLASS 2) TYPICAL
SCENERIO B:
For occupational activities where the risk levels exceed those in Scenario A:
- Greater visibility is desired during bad weather
- There are complicated backgrounds
- Employees are performing tasks that draw their attention away from approaching vehicle traffic
- Vehicle or moving equipment speeds exceed those in Scenario A
- Work activities take place closer to vehicle traffic.

PERFORMANCE LEVEL 3 (CLASS 3) TYPICAL
SCENARIO C:
For occupational activities where the risk levels exceed those in Scenario B:
- Workers are exposed to much higher vehicle speeds and/or reduced sight distances
- The worker and vehicle operator have high task loads, clearly placing the worker in danger
- The wearer must be visible through the full range of bady motions at a minimum of 1280 feet, and must be identifiable as a person.