People can now drive on the first of four new roundabouts for the Lincoln Eastern Bypass.
Cllr Richard Davies, executive member for highways, said: "Following three full months of weekend road closures at Lincoln Road, the first of the bypass roundabouts is now officially open.
"This is a huge milestone for the project because it means people can now drive along an actual section of the new road.
"Over the next three months, we're going to be working on the new roundabouts at Sleaford Road and Greetwell Road, while continuing construction of the new River Witham viaduct and the bridge at Heighington Road.
"Things are continuing to progress smoothly, and we are on track to open the new bypass next Spring, making it quicker and easier for people in and around the city to get around."
Although the Lincoln Road's roundabout is substantially complete and open to motorists, final surfacing works will need to be undertaken later in the project. Additionally, works are still required on the splitter islands, street lighting, signage and lining.
The Lincoln Eastern Bypass project is part-funded by a £50m Central Government capital grant and aims to minimise traffic congestion, support Lincoln’s growth as a principal urban centre, and enhance the inter-city environment.
For the latest news on the Lincoln Eastern Bypass, visit www.lincolnshire.gov.uk.