WORK is being carried out by Conwy County Borough Council to carry out essential bridge maintenance to the A547 Llandudno Junction Flyover.
The project will commence on May 9 until June 23.
The work will be carried out under three-way lights, with a one-way system on Ffordd 6G Road to Tesco.
Learner drivers (except HGVs), motorcycles less than 50cc, mopeds, invalid carriages and animals will be restricted to use the one-way up Ffordd 6G to Junction 18.
Eastbound traffic will be diverted to Junction 19 (Blackcat) to Conwy.
Westbound traffic will be diverted to Junction 17 (Conwy Morfa) to Conwy.
Traffic exiting the A55 at J18 will only have access to Tesco and Cineworld.
The works are being carried out 24/7 to minimise disruption.