http://www.legislation.gov.uk/wsi/2006/3383/contents/madeThe M4 Motorway (Junction 30 (Pentwyn) Slip Roads) (Trunking) Scheme 2006Roads and highwaysRoad buildingKing's Printer of Acts of Parliament2014-02-05HIGHWAYS, WALESThe M4 Motorway (Junction 30 (Pentwyn) Slip Roads) (Trunking) Scheme 20061The lengths of existing special road described in the Schedule...2In this Scheme:— (1) All measurements of distance are measured...3This Scheme shall come into force on 21 December 2006...SCHEDULELENGTHS OF SPECIAL ROAD TO BECOME A TRUNK ROADThe lengths of special road to become a trunk road...2006 No. 3383 (W.309)HIGHWAYS, WALESThe M4 Motorway (Junction 30 (Pentwyn) Slip Roads) (Trunking) Scheme 2006Made18 December 2006Coming into force21 December 2006The National Assembly for Wales as highway authority for the M4 motorway in Wales makes this Scheme in exercise of powers conferred by sections 16 and 19 of the Highways Act 19801 and of all other enabling powers2:—