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. Airport signs may be used to show the route to an airport. The main feature for airport signs is the black on white aircraft symbol, Symbol F 14. The symbol is on a tile 10 stroke widths high. Directions to an airport may be indicated by means of Sign F 221, Airport Direction, at appropriate junctions and/or Sign F 222, Airport Advance Direction, in advance of junctions. It should be noted that if the direction is to the right or left then the symbol shall be rotated to point in the appropriate direction.