The UK Government has promised improvements on the A75 between Gretna and Stranraer as part of its new Network North programme following the scrapping of HS2.
The northern leg of the fast rail project has been scrapped, with the billions of pounds saved to be ploughed into transport improvements across the UK.
However only one of these schemes is in Scotland, with a promise to upgrade and improve journeys on the A75.
The road links the southern end of the A77, which runs through Ayrshire, to the M6 motorway and the north of England.
The UK Government said: "As part of this package of investment we are strengthening connections across the United Kingdom. We are improving journeys on the A75 between Gretna and Stranraer.
"Following recommendations in the Union Connectivity Review, we will alleviate pinch points on the road, providing better links between the Cairnryan ferry terminals serving Northern Ireland and southwest Scotland, connecting with the M6 and Cumbria, and the A77 towards Glasgow."
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