The A74, also known historically as the Glasgow to Carlisle Road, was a major road in the United Kingdom, linking Glasgow in Scotland to Carlisle in the North West of England, passing through Clydesdale, Annandale and the Southern Uplands. A road in this area has existed since Roman Britain, and it was considered one of the most important roads in Scotland, being used as a regular mail service route. Today the A74 is a short link road in Glasgow that does not run on any of Telford's route and, as the A74(M), a portion of the replacement motorway.