The A48(M) Motorway (St Mellons, Cardiff) (Temporary 50 MPH Speed Limit) Order 2011
The Welsh Ministers, being the traffic authority for the relevant length of the A48(M) Motorway (hereinafter referred to as “the motorway”), are satisfied that traffic in a specified length of the motorway should be restricted by reason of works being executed thereon and the likelihood of danger to the public.

The Welsh Ministers, therefore, in exercise of the powers conferred upon them by section 14(1) and (4) of the Road Traffic Regulation Act 1984(1) and of all other enabling powers(2), ...