Nabasco® biocomposite road signs comply with all requirements of the applicable standards NEN-EN 12899-1 with mandatory CE-marking and the Dutch supplement NEN 3381:2020.

As prescribed in NEN 3381:2020, the back of the traffic signs is grey. This also meets this requirement of the Dutch Road Traffic Act.

The exact description of this requirement can be found in NEN 3381:2020 section 5.6.2 Colour of the rear side and reads: “The colour of the rear side of the sign, see figure 1, must be grey (RAL 7042 or comparable).