The effect of the Order is to temporarily restrict the speed of traffic on a length of the M4 motorway between junctions 45 and 46 for the safety of road users.
Effaith y Gorchymyn yw cyfyngu ar gyflymder traffig dros dro ar ddarn o draffordd yr M4 rhwng cyffyrdd 45 a 46 er diogelwch defnyddwyr y ffordd.