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
M1 motorway (Republic of Ireland) although many junctions have now been grade separated. Currently, to drive from Dublin city centre to Belfast, one travels along the M1 (Republic of Ireland), N1, A1 and M1 (Northern Ireland). The first official on-line Motorway service area in Ireland opened on the M1 on 8 September 2010, located near Lusk. A second near Castlebellingham (M1 North service area) opened on 29 September 2010. Each location has northbound and southbound facilities, with no connection across the motorway between each side. Open 24 hours a day, they provide fuel and food and are of a design similar to those found in