Construction's starting on Friday, July 18, at 9 p.m., on Route 27 (Old Sudbury Road) between the Sudbury town line and the intersection of Concord Road.
The work will continue through 7 a.m. on Saturday, July 19.
Work will continue on Sunday, July 20, at 9 p.m. through 7 a.m. on Monday, July 21.
During construction, there may be temporary detours and delays, the town reported on its website.
"Please anticipate these delays during this time and plan your travel accordingly. Please seek alternate routes if possible.