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 uphill section towards Windy Hill is the Rakewood Viaduct which carries the road over the Longden End Brook. The first section of the motorway in Yorkshire was completed between the county boundary at Windy Hill and Outlane in 1970. To build this section, of material was moved, of which was solid rock and of peat which had to be cut from the rock strata and deposited on adjacent hillsides. The geology of the moors resulted in the engineers splitting the carriageways for in the middle of this section, sparing Stott Hall Farm from demolition. The motorway crosses Scammonden Dam on