The A465 Trunk Road (Dowlais Top Roundabout, Merthyr Tydfil to Aberdulais Interchange, Neath Port Talbot) (Temporary Prohibition of Vehicles, Cyclists & Pedestrians) Order 2018 / Gorchymyn Cefnffordd yr A465 (Cylchfan Dowlais Top, Merthyr Tudful i Gyfnewidfa Aberdulais, Castell-nedd Port Talbot) (Gwahardd Cerbydau, Beicwyr a Cherddwyr Dros Dro) 2018