M4 motorway M4 motorway The M4, a motorway in the United Kingdom running from west London to southwest Wales, was originally referred to as the London-South Wales Motorway. The English section to the Severn Bridge was constructed between 1961 and 1971; the Welsh element was completed in 1993. The Second Severn Crossing officially renamed the Prince of Wales Bridge, was inaugurated on 5 June 1996 by HRH The Prince of Wales and the M4 was rerouted. Apart from its two spursthe A48(M) and the M48the M4 is the only motorway in Wales. From London to Bristol, the M4 runs close to the
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