The £118,000 Highways England scheme involves reconstructing part of the westbound carriageway and then resurfacing it.
The work is taking place near Warcop Training Camp and involves keeping a lane closed throughout with temporary traffic lights and a 40mph speed limit in place. The traffic lights will be staffed at key time to ensure drivers are not kept waiting for longer than necessary.
Overnight and weekend work will involve the use of convoy working at times - with drivers led past the road works at 10 mph by a contractor’s vehicle.
Highways England project manager Peter Gee, said:
The carriageway here needs strengthening so drivers can continue to enjoy safe, smooth and reliable journeys.
While we’ll be doing most of the work overnight to minimise disruption to drivers, the westbound carriageway will need to remain closed during the day for safety reasons as we need to rebuild the carriageway foundations.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.