The Order will temporarily prohibit and restrict traffic on lengths of the A4076 and A40 trunk roads between Haverfordwest and Milford Haven.
Bydd y Gorchymyn yn gwahardd a chyfyngu ar draffig dros dro ar ddarnau o gefnffyrdd yr A4076 a’r A40 rhwng Hwlffordd ac Aberdaugleddau.