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. Single Chevrons, Signs W 061, are available to indicate sharp changes of direction. These are rectangular signs consisting of a single yellow chevron on a black background. Unlike other warning signs, chevrons are ‘sight boards’, which are intended to be placed at the hazard so that drivers can see the change of direction clearly. They should be placed directly in the sight line of approaching drivers. Signs W 061, Single Chevrons, should be used instead of Signs W 062 or W 063 on bends or corners where there is restricted room on the verge or where their use will provide a clearer indication than a Multiple Chevron sign.