M4 corridor 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 by the Great Western Main Line, including the South Wales Main Line, and London Heathrow Airport. Technology companies with major operations located in the area include Amazon, Citrix Systems, Dell, Alcatel-Lucent, Huawei, Lexmark, LG, Microsoft, Novell, Nvidia, O2, Panasonic,
M32 motorway running lane for its final to a signal controlled junction. The hard shoulder and the remaining width of carriageway were rebuilt as two narrowed running lanes for general traffic, and the speed limit was reduced to . In 2009, the council announced that a park and ride facility would be developed next to the M32 to help alleviate congestion in the city centre. The project was expected to create 1,500 parking spaces and cost £191 million. In 2015, construction began on a bus-only junction between junctions 1 and 2, on land partly allocated to the Stapleton Allotments and near the