The effect of the Order is to temporarily prohibit traffic on a length of the A40 trunk road at Llandovery, Carmarthenshire to undertake works on or near the road.
Effaith y Gorchymyn yw gwahardd cerbydau dros dro ar ddarn o gefnffordd yr A40 yn Llanymddyfri, Sir Gaerfyrddin er mwyn gwneud gwaith ar y ffordd neu gerllaw iddi.