Furious motorists found themselves stuck in queues up to 13 miles long on Sunday after roadworks began on the expressway near Colwyn Bay on Saturday.
Drivers were caught in huge tailbacks from Junction 16 Dwygyfylchi to Junction 23 Llanddulas.
The problems were caused by the work on a new crossover between Juntion 23 Llanddulas and Junction 22 Old Colwyn as well as on-going work at the Conwy Tunnel.
The outer lanes are due to be closed in both directions between Junction 22 and Junction 23 until April 5.
Welsh transport minister Ken Skates tweeted “Roadworks on the A55 are banned from Easter until Autumn unless there’s an emergency repair needed”
The work is scheduled to last until April 5.