The effect of the order is to temporarily prohibit vehicles on a length of the A48 trunk road between Pensarn Roundabout and Nantycaws, Carmarthenshire to undertake works on or near the road.
Effaith y gorchymyn yw gwahardd cerbydau dros dro ar ddarn o gefnffordd yr A48 rhwng Cylchfan Pen-sarn a Nant-y-caws, Sir Gaerfyrddin er mwyn gwneud gwaith ar y ffordd neu gerllaw iddi.