M26 motorway the M26 at that time formed part of Ringway 4 and would have been designated as part of the M25. Construction of the first part of the M25 began in 1972 but before it opened, plans for the "London Orbital" motorway were modified to combine the southern and western part of Ringway 4 with the northern and eastern part of Ringway 3. To connect the two separate routes, which together were numbered as the M25, an additional section of road needed to be planned and the M25 route was diverted northwards from junction 5 to meet Ringway 3 at Swanley
M60 motorway unsigned Euroroutes E20 and E22. In 2008, the M60 was proposed as a cordon for congestion charging in Greater Manchester, although this was rejected in a referendum relating to the Greater Manchester Transport Innovation Fund. The M60 is the only true orbital motorway in the United Kingdom; the M25 motorway in London is not, due to the Dartford Crossing being designated the A282. The M60 was developed by connecting and consolidating the existing motorway sections of the M63, M62, and an extended M66. It came into existence as the M60 in 2000, with the completion of the eastern side (Junctions