Works to completely demolish and reconstruct Lincoln Road in Welton are due to start next month.
Cllr Richard Davies, executive member for highways, said: "This three-month piece of work is part of our larger A46 Dunholme/Welton improvement project, which will see a new roundabout built to replace the current T-junction with Lincoln Road Welton."
The works are expected to start on Monday 5 October, and will take up to 13 weeks to complete (subject to suitable weather).
A full 24/7 road closure will be in place during the works on Lincoln Road, between Honeyholes Lane and the garage, car wash and car dealer.
The diversion route will be via Honeyholes Lane / Ryland Road / Lincoln Road Dunholme / A46, and vice versa.
Cllr Davies continued: "As part of the works, we will be completely demolishing a section of Lincoln Road between Honeyholes Lane and the A46 Welton Road.
"This will involve digging up 280m of old carriageway and fully rebuilding it with nearly 2,500 tonnes of new tarmac.
"When finished, Lincoln Road Welton will be up to 2m higher in places so that it can tie into the new roundabout we're building.
"The team will also be working with Anglian Water and BT throughout the closure to divert a number of underground pipes and cables as part of the road reconstruction process.
"Like any major roadworks, there will inevitably be some disruption during these works, but we will do everything we can to keep this to an absolute minimum. This includes maintaining access to the garage, car wash and car dealer throughout the works."
The whole A46 Dunholme/Welton improvement project is expected to be complete next spring.
The scheme is being part-funded using the £2m allocated to the authority by the Department of Transport (DfT) from tranche 2 of its National Productivity Investment Fund. The remaining funding for the construction of the scheme will come from a combination of third party contributions and the county council.
For the latest news on the A46 Dunholme / Welton Roundabout, visit www.lincolnshire.gov.uk/majorprojects.