| | Vest Ansi Standards | | | Class 1 | | | Lower visibility requirements for workers well separated from trafficVehicle and equipment speeds -- under 25 MPHBackground material - 217 square inchesRetro reflective material is 155 square inches
| | | Class Ii | | | Medium visibility requirements for workers who are on or near roadwaysVehicle and equipment speeds -- 25-50 MPHBackground material - 775 square inchesRetroreflective material is 201 square inches
| | | Class Iii | | | Highest visibility requirements for workers in high-risk areas and situations, needing to be seen by traffic by minimum distance of 1,280 feetVehicle and equipment speeds -- over 50 MPHBackground material -- 1,240 square inchesRetroreflective material is 310 square inches
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