The A1 southbound will be closed all this weekend from the A1(M) Junction 14 (Alconbury) to the A14 Junction 23 (Brampton Hut roundabout). The closure will be in place from 9pm Friday 30th Nov until 6am Monday 3rd DecemberĀ and will be due to works by Highways England on the A14 Cambridge to Huntingdon upgrade (please note that from 9pm Friday to 6am Saturday the closure will be from A1(M) J14 all the way through to Buckden).
The diversion from Friday 9pm until Saturday 6am will be along the A14 to J24 (Godmanchester), A1198 southbound to the A428, then the A428 westbound to rejoin the A1 at Wyboston. The closure is in red, and the diversion in purple on the map below: