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. Countdown Markers, Signs F 340.1 to F 340.3 should be provided in advance of a diverge lane on all grade separated dual carriageways or motorways. They should be located in sets of three on the left-hand verge at approximately 300m (F 340.3), 200m (F 340.2) and 100m (F 340.1) in advance of the start of the diverge taper, in order to give the driver a final countdown to the start of the diverge slip lane. Countdown Markers should not be provided at junctions on at-grade or single carriageway roads.