Temporary traffic lights outside Iceland supermarket in Shotton are causing long delays along Chester Road West.
Work is being carried out by Scottish Power who are repairing on a live cable fault.
Engineers are digging up part of the pavement and there may be some ‘carriageway incursion.’
A live traffic map shows vehicles moving at around 3mph from the direction of Queensferry past Deeside Retail Park up through Shotton.
Traffic travels at around 18mph on average along that stretch of road.
Road users travelling from Connah’s Quay through Shotton are also experiencing long delays.
Work is scheduled to last up to the 14th December but it is unclear how long the temporary lights will be in place.