What You Need to Know About Rear Markers for Trailers
In the following text you will learn about the purpose and main characteristics of marker boards for the trailers and semi-trailers of heavy or long trucks.
Marking Boards for Trailers and Semi-Trailers in Transit Traffic
Trailers and semi-trailers must display rear marking plates in order to warn other road users about the abnormal dimensions or the low speed of a vehicle. These vehicle signs have to be retro-reflective, i. e. they cast back incident light to its source. As a result, the trailers can be seen much earlier in low light conditions when illuminated. When visibility is poor – especially at night, dawn or on foggy or rainy days – retro-reflective marker boards can help to increase conspicuity and hence prevent accidents.
For best visibility, it is important to know that rear marking plates are available in two reflectivity classes: while the initial ECE regulation version 70.00 stipulates a reflectivity performance of class RA2/C, the up-to-date version 70.01 requires class RA3/C.
Since stronger reflectivity means better visibility and therefore greater safety, we recommend marker boards corresponding to the version ECE 70.01.
How to Find the Right Rear Marker Board
Since rear marker boards differ in more aspects than reflectivity performance, it can be difficult to make the right choice. We would like to help you by guiding you through the variety of products. Please answer the following questions:
a) Do you prefer retro-reflectivity or fluorescence?
Rear marker boards for trailers or semi-trailers show a yellow centre and framed by a red border. The yellow centre is always retro-reflective, while the red border can be either retro-reflective (corresponding to board class 4 as per ECE 70) or fluorescent (corresponding to board class 2 as per ECE 70). Which one of the two versions you opt for is your own choice, i.e. they are interchangeable.
b) What board size is suitable for your trailer?
Depending on the trailer body, you may find full, half or quarter marker boards more fitting. Full markings measure 1130 x 130mm and are attached as single plate to the rear. Half markings measure 565 x 130mm and must be mounted in pairs to the rear. If you display quarter markings (283 x 130mm), you need to attach four of them to the back of the (semi-) trailer.
c) Do you need the marker board permanently or temporarily?
How would you like to attach the rear marking plates? This depends on the intended period of application: The marking sign as self-adhesive film is the most convenient option for a permanent usage, while a magnetic sign offers high flexibility, making it the perfect choice for temporary usage. A marking plate made of aluminium combines both possibilities: It can be used permanently or removed / attached as needed.