The risks associated with movements on the roadway and the presence notably of construction equipment’s and road vehicles are important regardless of the weather conditions, day or night.
EN ISO 20471 is intended to facilitate the detection of people by wearing appropriate and efficient high visibility clothing.
Also, this standard specifies, among others, the requirements of materials, color, retroflexion, minimum surfaces of materials, and their positions on the protective clothing in order to achieve this goal.
3 classes are defined in terms of mandatory minimumvisible surfaces in m2.
Class 1 is the lowest and Class 3 is the highest.
The classes of retroreflective materials of the old standard (EN471) has been cancelled and only the Class 2 is remaining.
In order to improve the detection of the wearer from all sides (360 °), all parts of the garment must contain fluorescent materials and reflective tapes, around the torso, around legs for the pants and sleeves for jackets (2 bands spaced by 50 mm).
Background fluorescent coloured material, for the day
Fluorescence is the ability of a material to reflect more light than it receives.