Dangerous Goods by Road
general provisions
when applying restrictions to the passage of vehicles carrying dangerous goods through tunnels, the competent authority shall assign the road tunnel to one of the tunnel categories defined in 1.9.5.2.2. account should be taken of the tunnel characteristics, risk assessment including availability and suitability of alternative routes and modes and traffic management considerations. the same tunnel may be assigned to more than one tunnel category, e.g. depending on the hours of the day, or the day of the week etc.