Traffic tailbacks are being caused in both directions on the A272 at Piltdown where roadworks are under way.
A CCTV survey and investigation connected with drainage works are being undertaken near Old Spot Farm.
The roadworks began today and are expected to run until February 5. Work will take place between 9.30am and 4pm each day.
Details of delays in the Uckfield area can be found on the BBC Travel website.