The effect of the Order is to temporarily prohibit all vehicles, other than vehicles being used by the emergency services and for the works, from proceeding in the lengths of the motorway.
Effaith y Gorchymyn yw gwahardd dros dro bob cerbyd, ac eithiro cerbydau a ddefnyddir gan y gwasanaethau brys ac ar gyfer y gwaith, rhag mynd ar y darnau o’r draffordd.