The A487 Trunk Road (Dyfi Bridge to Parc Menai, Gwynedd) (Temporary Traffic Prohibitions and Restrictions) Order 2018 / Gorchymyn Cefnffordd yr A487 (Pont ar Ddyfi i Barc Menai, Gwynedd) (Gwaharddiadau a Chyfyngiadau Traffig Dros Dro) 2018