The A4042 Trunk Road (Cwmbran Roundabout to Pontypool Roundabout, Torfaen) (Temporary Traffic Prohibitions and 40 mph Speed Limit) Order 2019 / Gorchymyn Cefnffordd yr A4042 (Cylchfan Cwmbrân i Gylchfan Pont-y-pŵl, Torfaen) (Gwaharddiadau Traffig a Therfyn Cyflymder 40 mya Dros Dro) 2019