The Order will impose 30 mph and 40 mph speed limits on lengths of the A487 trunk road known as the Porthmadog, Minffordd and Tremadog Bypass, Gwynedd.
Bydd y Gorchymyn yn gosod terfynau cyflymder o 30 mya a 40 mya ar ddarnau o gefnffordd yr A487 o’r enw Ffordd Osgoi Porthmadog, Minffordd a Thremadog, Gwynedd.