CE Certified Road sign manufactured in Knocktopher, Kilkenny. CE certification is a required standard for Road Signs in the EU since 2013. National Roads- Unlit Area: RA1 if AADT<3500, RA2 if AADT is >3500. Lit Area: RA2. Regional Roads- Unlit Area:RA1. Lit Area: RA2. Local Roads- Unlit and Lit Area: RA1. Roadworks- Unlit and Lit Area: RA2. 4 The Maximum Axle Weight Sign, RUS 054, indicates that vehicles on which any axle loading exceeds that specified on the sign are prohibited. This should be used in situations where the load imposed by the axle is more critical than that imposed by the gross weight of the vehicle, such as when the road crosses a weak culvert or short-span bridge.