Improvement works on the Roman Bank in Skegness will close the road fully for just over eight months.
Work is being carried out between Roman Bank’s junction with Burgh Road/Castleton Boulevard and just past the junction with Elmhirst Avenue.
Lincolnshire County Council will start the work on Monday, September 7 and aim to replace worn out carriageway and footpaths, improve drainage and refurbish a pedestrian crossing.
As part of the project, a 24/7 road closure will be in place on the 550m stretch of road.
The diversion route will be via the A52 / C541 / A158 at the Gunby dual carriageway, and vice versa.
Drivers will not be able to access or park within the area, but pedestrian access remains available.
Cllr Richard Davies, executive member for highways at the council, said: “This stretch of Roman Bank is a vital piece of our coast’s infrastructure, but it is in desperate need of repair.
“However, thanks to the £3.6m in funding we received from the Department for Transport earlier this year, we can finally give it a new lease of life.
“Our plan is to start work just after the end of the school summer holidays next month so it’s ready to re-open next May, just in time for summer.”