Essential maintenance work on the A1 between Houndwood and the Reston junction will close the southbound carriageway overnight from 8pm on Sunday, December 4, until 6am on Monday, December 5.
Southbound traffic will be diverted at the A1107 Tower Farm junction, south of Cockburnspath roundabout, and travel on the A1107 through Coldingham to the Eyemouth junction, where it will rejoin the A1.
On the A1107 through Coldingham, traffic lights will be in place to ensure the safe flow of traffic as it is narrow there.
Local access will be maintained as far south as Houndwood.
Bus services will follow the diversion route.