The effect of the Order is to temporarily restrict and prohibit traffic on a length of the A458 and trunk road from east of Middletown to Nant-y-Dugoed, Powys to undertake works on or near the road.
Effaith y Gorchymyn yw cyfyngu a gwahardd traffig dros dro ar ddarn o gefnffordd yr A458 o fan i'r dwyrain o Dreberfedd i Nant-y-dugoed, Powys er mwyn gwneud gwaith ar y ffordd, neu gerllaw iddi.