‘Essential’ work to the Seaton Tramway level crossing at Colyford will see a stretch of A3052 road shut for nine days next month.
Existing tracks will be removed and new rails and foundations put in place under and across the carriageway between January 4 and 12.
The project and road closure have been given the go-ahead by Devon County Council (DCC).
A Seaton Tramway spokesperson said: “We are pleased that a road closure order has been granted to allow us to undertake these essential works.
“We will be working closely with our main contractors to remove the existing 45-year-old track and replace it with newly-sourced rails and more substantial footings.
“Of course, in doing this the carriageway must be closed off to road traffic for the whole duration of the works as we are governed by the curing time of the foundations.
“All versions of a road closure have been explored but we want to ensure the works are done right and survive the next 40 plus years without further disrupting the A3052.
“We apologise for any disruption or inconvenience this causes during these essential works.”
The line between Seaton and Colyton took a decade to complete when the tramway started operating from Riverside Depot in 1970.
At first it only ran half a mile to Bobsworth bridge.
The hard-working team made their way closer and closer to Colyton as they laid the track by hand,on top of the bed of the old railway line that once linked Seaton to Exeter and London.
Using a team of volunteers and one works car and wagon, it was not until 1975 that trams could finally cross the road and complete their journey towards Colyton.
Now, after 45 years of wear and tear, the track and road is now in need of replacement.
The new rails will be laid at a new angle to better suit the points at Colyford and new track just north of Colyford Crossing.
Once the work is completed, it will also see the installation of a new overhead system which has been delayed to coincide with the project and avoid a second road closure.
The track scheme is one of a few taking place over the next year.
Others include a new halt at Swans Nest Loop which will eventually allow passengers to board directly at Seaton Wetlands.