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The A74(M) and M74 form a major motorway which runs for over 80 miles in Scotland. Following an extension opened on 28 June 2011, it connects the M8 motorway west of Glasgow to the English border at Gretna,where it becomes the M6. In conjunction with the M6, it forms one of the two major cross-border routes between Scotland and England. As the motorway is one continuous route and has a continuous junction numbering system, the entire route is often erroneously referred to as M74 although, the section south of Abington (more than half its length) is officially the A74(M).

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