The effect of the order is to temporarily restrict and prohibit traffic on lengths of the A483 trunk road between Llandovery and Sugar Loaf, Carmarthenshire to undertake works on or near the road.
Effaith y gorchymyn yw cyfyngu a gwahardd traffig dros dro ar ddarnau o gefnffordd yr A483 rhwng Llanymddyfri a Dinas-y-bwlch, Sir Gaerfyrddin er mwyn gwneud gwaith ar y ffordd neu gerllaw iddi.