EN ISO 20471
This International Standard Specifies requirements for high visibility clothing, which is capable of visually signalling the user’s presence. The high visibility clothing is intended to provide conspicuity of the wearer in any light condition when viewed by the operators of vehicles or other mechanised equipment during daylight conditions and under illumination of headlights in the dark.
High Visibility clothing has a fluorescent surface, combined with reflective material that meets certification requirements in 3 different classes:
Class 3: Highest Level
Highest Level of protection – required for any persons working on or near motorways/dual carriageways or airports. Must incorporate a minimum of 0.80m sq of background materials and 0.20m sq of retro-reflective materials. (4 metres of 5cm wide reflective tape)
Class 2 – Intermediate level
Required for any person working on or near A and B Roads, also for delivery drivers. Must incorporate a minimum of 0.50m sq of background material and 0.13m sq of retro-reflective material. (2.60 metres of 5cm wide reflective tape)
Class 1: Minimum level
Minimum level of protection required for any persons working on a private road or to be sed in conjunction with a higher classed garment. Must incorporate a minimum of 0.14m sq of background material and 0.10m sq of retro-reflective material. (2 metres of 5cm wide reflective tape)RIS 3279
Railway Group Standard sets out the minimum specification for high visibility warning clothing in Rail Industry.