A shortage of construction materials has delayed an upgrade project on the A1(M) in Cambridgeshire.
Work on the 4.8km section of the southbound carriageway between Peterborough and Huntingdon had been due to start last week.
It will now begin on 11 September, due to the materials, the Highways Agency said.
The resurfacing scheme runs between junction 15 and 14, at Sawtry, near Glatton Ways and Wheatsheaf flyover.
The project includes renewal of road studs and road markings, and is due to be completed Friday 17 October.
Highways Agency project sponsor, Michael Freeman said: “The current surface is worn and needs replacing. We always try to minimise inconvenience to road users when we are carrying out work; there will be narrow lanes and some slip road closures.”