M18 motorway (Great Britain) and 12 June 2015. The M18 was originally to be part of the M1, but it was decided to route the M1 towards Leeds instead of Doncaster, and the routing of what would have been the M1 east of Sheffield became the M18. Data from driver location signs are used to provide distance and carriageway identifier information. The location sequence is a continuation of the M1 location sequence. !scope=col|miles !scope=col|km !scope=col abbr="Southbound"|Southbound exits (B carriageway) !scope=col|Junction !scope=col abbr="Northbound"|Northbound exits (A carriageway) !scope=col|Coordinates M18 motorway (Great Britain) The M18 is a motorway in Yorkshire, England. It runs from the east of
M62 motorway Construction started in 1957, and the motorway opened in 1960. It was originally built as a 2-lane motorway only. It was later re-numbered M63. The section between the interchange with the Stretford-Eccles Bypass and Salford is now occupied by the M602 motorway. The Eccles–Pole Moor section opened in 1971. Between Eccles and Pole Moor, 67 motorway crossings were required, including seven viaducts and eight junctions. Much of the Worsley Braided Interchange was built on undeveloped mossland where deep peat deposits had been covered with waste. Between Worsley and Milnrow, some underlying coal seams were still actively worked when the motorway