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
York road provides the principal link to the motorway network, linking York to both the A1(M) and the M1 motorways at a distance of about from the city. The transpennine M62 motorway is less than away providing links to Manchester and Liverpool. The city is surrounded on all sides by an outer ring road, at a distance of some from the centre of the city, which allows through traffic to by-pass the city. The street plan of the historic core of the city dates from medieval times and is not suitable for modern traffic. As a consequence many of the routes