The fault occurred on Friday, primarily affecting a number of lights on the Lifford-bound side
Works are continuing to identify and resolve the fault affecting a section of the public lighting network at the Dry Arch Roundabout in Letterkenny.
Due to the complexity of underground services in the area, repairs are taking longer than anticipated.
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"It is expected that the works will take at least a further day to complete," Donegal County Council said. "Updates will be provided as progress continues."
The fault occurred on Friday, primarily affecting a number of lights on the Lifford-bound side.
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