The Order will impose temporary 30 mph, 40 mph and/or 50 mph speed limits on lengths of the A470 trunk road between Coryton and Merthyr Tydfil when work is needed at a particular site.
Effaith y Gorchymyn arfaethedig fydd gosod dros dro naill ai terfyn cyflymder o 50 mya, 40 mya neu 30 mya ar y darnau o gefnffordd yr A4060