Wooden road barriers are classified, like
steel ones, according to strength.
The classes are:
- N2 for urban and extra-urban roads
- H1 H1 barriers are often used on main, secondary and urban suburban roads
- H2 often used on main extra-urban roads with type II traffic and exteaurban/urban slip roads with type III traffic.
Each road barrier / guard rail is installed according to the technical installation requirements provided by the manufacturers in compliance with the EN 3117-5 2017 standard and the relative certificate of correct installation is provided.