English: The M4 Motorway (Eastbound and Westbound Exit Slip Roads at Junction 28 (Tredegar Park Interchange), Newport) (40 MPH Speed Limit) Regulations 2018

Welsh: Rheoliadau Traffordd yr M4 (Ffyrdd Ymadael tua’r Dwyrain a thua’r Gorllewin wrth Gyffordd 28 (Cyfnewidfa Parc Tredegar), Casnewydd) (Terfyn Cyflymder 40 MYA) 2018