M4 corridor bridge, serving Chepstow, being renumbered the M48, although the area is still generally considered as falling within the M4 corridor. Since the start of the 21st Century there has been evidence of more investment west of Cardiff, such as: M4 corridor The M4 corridor is an area in the United Kingdom adjacent to the M4 motorway, which runs from London to South Wales. It is a major high-technology hub. Important cities and towns linked by the M4 include (from east to west) London, Slough, Bracknell, Maidenhead, Reading, Newbury, Swindon, Bath, Bristol, Newport, Cardiff, and Swansea. The area is also served
M32 motorway national builders' strike. During construction, the Local Government Act 1972 was passed, and responsibility passed to the newly created Avon County Council in April 1974. This section, and hence the full extent of the motorway, was opened to traffic in May 1975. The cost was reported to be £10.4 million (now £ million). A bus lane, constructed in 2008 on the southbound carriageway of the A4032, Newfoundland Way, links the end of the M32 at junction 3 with Cabot Circus. It starts just south of junction 3 and runs for , adjacent to the central reservation, and becomes a general