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. The No U-Turn Sign, RUS 017, is used to give effect to a regulation which prohibits U-turns. Sign RUS 017 is usually used in connection with dual carriageways and other roads having a central reserve. It shall be mounted on the central reserve as close as practicable to the point at which U-turns are prohibited, facing traffic approaching from the direction or directions to which the prohibition applies. Where there is no central reserve or island, the sign shall be mounted on the left-hand side of the road and duplicated on the right-hand side.