M25 motorway Europe's second longest orbital road after the Berliner Ring, which is . Originally built almost wholly as a dual three-lane motorway, much of the motorway has been widened: to dual four lanes for almost half, to a dual five-lanes section between junctions 12 and 14 and a dual six-lane section between junctions 14 and 15. Further widening is in progress of minor sections with plans for managed motorways in many others. To the east of London the two ends of the M25 are joined to complete a loop by the non-motorway A282 Dartford Crossing of the River Thames between Thurrock
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