Guide To: ECE R3 - Reflex Reflectors

UN ECE R3, or Regulation No. 3 of the Economic Commission for Europe of the United Nations, is a regulation that specifies the requirements for retro-reflecting devices for power-driven vehicles and their trailers. These devices are used to improve the visibility of vehicles at night and in poor weather conditions.

UN ECE R3 applies to retro-reflectors that are either stand-alone or built into other light units, such as combination or multi-function lights. The regulation specifies the size, shape, color, and photometric performance of retro-reflectors. It also specifies the test methods that must be used to verify that retro-reflectors meet the requirements of the regulation.

UN ECE R3 is recognized by many countries around the world. This means that retro-reflectors that have been approved under UN ECE R3 can be used on vehicles in these countries.

Here are some of the key requirements of UN ECE R3:

Retro-reflectors must be white or amber in color. Retro-reflectors must have a minimum size of 150 mm x 150 mm. Retro-reflectors must have a minimum photometric performance of 100 mcd/lux/m2. Retro-reflectors must pass a series of tests to verify that they meet the requirements of the regulation. UN ECE R3 is an important regulation that helps to improve the safety of vehicles on the road. By requiring retro-reflectors to meet certain standards, the regulation helps to ensure that these devices are effective in improving visibility at night and in poor weather conditions.