When complete, the project will form the first section of the Spalding Western Relief Road.
Main construction works officially started on Monday 10 January and are expected to last until Autumn 2023 (subject to weather and any unforeseen circumstances).
Cllr Richard Davies, executive member for highways, said: "We've officially started construction of the northern section of the new Spalding Western Relief Road.
"Now that work has officially started, the team will be focusing on building a new five-arm roundabout on Spalding Road, a T-junction next to Vernatt's Drain and a new bridge over the Lincoln to Peterborough rail line.
“Although there shouldn’t be any significant disruption on local roads until this autumn, some occasional temporary traffic management will be required for utility diversion works.
“Two Plank Bridge, its connecting footpath and the footpath on the Wygate estate across the rail line are also now closed to ensure the safety of everyone that uses them. This is while we replace the old wooden bridge and carry out large-scale engineering works along the path as part of the relief road project.”
From late Autumn 2022, a combination of road closures, reduced speed limits, and temporary traffic signals will be used as needed for the remainder of the project, including near Enterprise Way and Spalding Road. More specific dates and details will be shared once finalised and confirmed.
Cllr Davies continued: "As part of this massive infrastructure project, we'll be installing nearly 3,000 underground pile foundations to support the new bridge. I want to thank everyone in advance for their patience, as some of this work may be noisy.
“Rest assured that the team will be doing everything they can to keep any disruption to a minimum. This includes carrying the works out in the daytime only and using a special hoarding to lessen the noise impact.”
For more information about the Spalding Western Relief Road project, visit www.lincolnshire.gov.uk/swrr.