The effect of the Order is to temporarily prohibit all vehicles (other than those being used by the emergency services), cyclists and pedestrians from proceeding on the length of the trunk road.
Effaith y Gorchymyn yw gwahardd dros dro bob cerbyd (ac eithrio’r rhai sy’n cael eu defnyddio gan y gwasanaethau brys), pob beiciwr a phob cerddwr rhag mynd ar y darn o’r gefnffordd.