I have to correct myself.
As could be seen here:
https://www.mapillary.com/app/user/micmin1972?focus=photo&pKey=PdzW4Acx7BDGd6HXS_rxqg&signs=true&points=true&lat=51.97618226920895&lng=4.314399742665955&z=18.01246536171561&trafficSign%5B%5D=complementary--accident-area--g1&mapFeature%5B%5D=construction--barrier--temporary
The material is not wood but  	metal and wood
I added it 