Another lane will be added to the Heads of the Valleys road between Bryn Mawr and Tredegar.
It follows the announcement of almost £82 million of European funding.
The A465 dualling scheme will see improvements to the 7.8km route which extends from the north of the A465 roundabout at Brynmawr and tie in with the previously improved A465 at Tredegar.
The work is likely to start early next year.
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Regional results for the Assembly elections have been announced this morning.
The morning sunshine will soon get to work, with rising temperatures and sunny spells for all!
Results for constituencies across Wales are being announced. Find out the details for your area.