Guide To: ECE R27 - Advance warning triangles

UN ECE R27, or Regulation No. 27 of the Economic Commission for Europe of the United Nations, is a regulation that specifies the requirements for advance warning triangles for power-driven vehicles and their trailers. These devices are used to warn other road users of a hazard ahead, such as a stopped or disabled vehicle.

UN ECE R27 applies to advance warning triangles 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 advance warning triangles. It also specifies the test methods that must be used to verify that advance warning triangles meet the requirements of the regulation.

UN ECE R27 is recognized by many countries around the world. This means that advance warning triangles that have been approved under UN ECE R27 can be used on vehicles in these countries.

Here are some of the key requirements of UN ECE R27:

Advance warning triangles must be red in color. Advance warning triangles must have a minimum size of 500 mm x 500 mm. Advance warning triangles must be retro-reflective. Advance warning triangles must be mounted at a height of at least 450 mm and not more than 1,500 mm above the road surface. UN ECE R27 is an important regulation that helps to improve the safety of vehicles on the road. By requiring advance warning triangles to meet certain standards, the regulation helps to ensure that these devices are effective in warning other road users of a hazard ahead.

Here are some additional points about UN ECE R27:

Advance warning triangles must be placed at least 100 m behind the hazard. Advance warning triangles must be placed in a clear and visible location. Advance warning triangles must be placed so that they are not obscured by other objects.