Guide To: ECE Regulation 104

UN ECE R104, or Regulation No. 104 of the Economic Commission for Europe of the United Nations, is a regulation that specifies the requirements for the retro-reflective marking of power-driven vehicles and their trailers. These devices are used to improve the visibility of vehicles, especially at night and in poor weather conditions.

UN ECE R104 applies to retro-reflective marking devices 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-reflective marking devices. It also specifies the test methods that must be used to verify that retro-reflective marking devices meet the requirements of the regulation.

UN ECE R104 is recognized by many countries around the world. This means that retro-reflective marking devices that have been approved under UN ECE R104 can be used on vehicles in these countries.

Here are some of the key requirements of UN ECE R104:

Retro-reflective marking devices must be retro-reflective, meaning that they reflect light back to the source. Retro-reflective marking devices must be of a type that is approved for use on vehicles. Retro-reflective marking devices must be able to withstand a certain amount of vibration without deforming. UN ECE R104 is an important regulation that helps to improve the safety of vehicles on the road. By requiring retro-reflective marking devices to meet certain standards, the regulation helps to ensure that these devices are effective in improving the visibility of vehicles, especially at night and in poor weather conditions.

Here are some additional points about UN ECE R104:

Retro-reflective marking devices must be marked with the UN ECE R104 approval number. Retro-reflective marking devices must be installed in a way that ensures that they are visible to other road users. Retro-reflective marking devices must be replaced if they are damaged or become defective.