The effect of the Order is to impose a temporary 50 mph speed limit on a length of the A4042 trunk road between Croesyceiliog and Pontypool to safeguard road users.
Effaith y Gorchymyn yw gosod terfyn cyflymder 50 mya dros dro ar ddarn o gefnffordd yr A4042 rhwng Croesyceiliog a Phont-y-pŵl er mwyn diogelu defnyddwyr y ffordd.