The effect of the Order is to temporarily prohibit and restrict traffic on lengths of the A40 trunk road between St Clears and Haverfordwest to undertake works on or near the road.
Effaith y Gorchymyn yw gwahardd a chyfyngu ar draffig dros dro ar ddarnau o gefnffordd yr A40 rhwng Sanclêr a Hwlffordd er mwyn gwneud gwaith ar y ffordd neu gerllaw iddi.