Officials said the work had been completed during the early hours of this morning.
Supplies across large parts of the borough are being affected.
A man who was detained on suspicion of murder earlier this week has now been de-arrested, detectives say.
Officials insisted they have a duty to make the road safer, despite claims their plan is 'a risk too far'.
Police say at least two people have been injured in the incident this morning.
Emergency crews were called out this morning.
A motorist was detained on suspicion of drug driving following the first of three separate collisions yesterday afternoon, police say.
An investigation is continuing, but police say they believe the death is an 'isolated' incident.
Emergency crews are at the scene and the road is currently closed, police say.
Safety and heritage concerns were raised about plans for the redevelopment of a prominent Lynn town centre building.
Lynn councillors have raised no objections, although questions were raised about patient access to the planned building.
Police are urging motorists to be vigilant after a number of collisions were reported on one of the region's busiest roads this afternoon.
Nearly £50 million could be spent on a new facility in Lynn, plus four others across the region.
A single case of the virus has been identified, officials say.
Officials insist they are addressing concerns raised in a leaked document.
Up to 6,500 patients could be treated at the new facility, a report says.
Concerns have been raised over plans to provide homes and business space at a prominent Lynn site which has been empty for nearly 15 years.
Restricted areas have been set up around the site.
Officials have been accused of ignoring local experience nearly a year after a camera was removed amid safety concerns.
A Lynn business group is set to continue operating until at least 2027 following a referendum of town centre companies.