The A22 Maresfield by-pass will be closed for three nights early next month.
Carriageway “jointing” work will be carried out from Monday, August 5, between the Blackdown roundabout to the A272 Batts Bridge roundabout.
The works will be between 8pm and 5am.
Rain may cause the project to be delayed.
Traffic will be diverted via Batts Bridge Road, High Street, A26 Uckfield by-pass and vice-versa.
Lorries will be diverted via the A22, Lampool Road (towards Ashdown Forest), New Road to join the A26 south of the Crow and Gate pub, and vice-versa.
East Sussex Highways said the road will be closed to through traffic. Anyone needing vehicle access should discuss with the team on site. There may be delays.