Users of the A55 across North Wales will face five weeks of disruption when Conwy tunnel improvements are undertaken.
Work starts this week and will last until the end of February.
The Pen-y-Clip tunnel near Penmaenmawr will shut for two weeks, with traffic diverted around the headland and the Conwy tunnel will be reduced to one lane for three weeks from 14 February.
There will be some short-term closures but Transport Minister Edwina Hart said officials would do “all they can” to keep disruption to a minimum, and the work would be completed by early March.
