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
M4 (Copenhagen) M4 (Copenhagen) The M4 (the Harbour Line) is a future expansion of the Copenhagen Metro connecting Nordhavn in the north with Sydhavn in the south. The northern arm was approved by the Danish Parliament in 2012 and is expected to open in 2019, while the southern arm was approved in 2015 and is expected to open in 2023. Both Nordhavn and Sydhavn are former industrial areas situated at opposite ends of the Port of Copenhagen and currently undergoing urban renewal under the auspices of By & Havn. The M4 Line will serve 13 stations. From København H to Østerport the