Part of the A30 in Cornwall is set to fully reopen on Monday as a £330m upgrade nears its conclusion.
National Highways said the road would be shut between Chiverton Cross and Carland Cross from 20:00 BST on Friday until 06:00 on Monday, according to the BBC.
The organisation said it was planning to open all junctions and lanes of the A30 by Monday morning.
Construction work for the dual carriageway upgrade project began in 2020.
However, National Highways said there was still work to do on local roads and infrastructure to fully complete the project, meaning more roads would be closed in the next few weeks.
Between Friday and Monday, National Highways said local access at Chiverton and via the B3284 at Chybucca would be maintained during the closure.
It added the link from the A39 to the north via the B3285 would also be maintained.
Drivers looking to use the A30 during the weekend closure have been told by National Highways to plan ahead and expect to be delayed.