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 also serves a spur route: the M621 motorway, before bypassing Leeds to the south to the interchange with the M1 motorway, Lofthouse Interchange, at junction 29. East of Leeds, the motorway serves Wakefield at junction 30 and crosses by the River Calder. At junction 32a, the road is crossed by the A1(M) motorway, which also runs parallel to it for a short distance. The next junction serves the A162 road, previously the A1, and Ferrybridge service station. After Ferrybridge, the motorway becomes relatively flat, except for a bridge that crosses the River Ouse. For approximately after this, the road runs