Works along the A46 and Lincoln Road, including hedge clearance and other preliminary tasks, will take place this February ahead of work on the new roundabout starting this summer.
Daytime works off the carriageway and on Lincoln Road will begin Monday 24 February for five days. They will take place from 9:30am to 3:30pm under Stop/Go sign control.
From Friday 28 February until Friday 6 March, weekday-only, there will be night-time works on the A46. They will take place from 7pm to 6am under temporary three-way traffic signals
Cllr Richard Davies, executive member for highways, said: "Now that legal orders for improving the A46 / Lincoln Road junction have been confirmed by the Secretary of State, we're set to make a start getting the area ready for when we start building later this year.
"As part of these early works, a crew will be on-site for five days, clearing hedges and other vegetation to make way for the new roundabout and other changes to the road layout.
"While on-site, the team will also be carrying out Ground Penetration Radar surveys to check for any unknown underground cables and pipes that might not be on the plans we have.
"We'll do our absolute best to minimise any disruption during these early works and look forward to breaking ground on the project this summer."
When built, the new roundabout, along with the improvement of visibility of the A46 to the east, will improve safety and reduce congestion at the current simple T-junction. The improvement will also accommodate future development in the area.
The A46 Dunholme / Welton Roundabout project will be 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.