Drivers were likely to see delays on a stretch of the A47 after work to repair damage caused by Storm Eunice started.
UK Power Networks started work on the Acle Straight on Wednesday, March 2, to replace two wooden poles damaged by high winds.
As past of the roadworks, one lane of the road was closed and two-way signals were in place to control traffic.
The work was predicted to end on Wednesday, March 9, at 9am.
A spokesman for UK Power Networks said: "Our engineers are doing emergency repair work on the Acle Straight to replace two wooden poles damaged by high winds during Storm Eunice.
"A lane closure is required for safe working as new electrical equipment is installed.
"We apologise for any inconvenience caused. Our intention is to complete this work and clear the site as quickly as is safely possible."
However, UK Power Networks later announced the traffic signals would not be returning for a second day after the electrical work was finished six days ahead of schedule.
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