The Sandwich St. roundabout will officially open over the weekend.
Motorists have dealt with detours around the high traffic intersection just west of the Ambassador Bridge for months, traffic flow will continue through the area at 5pm Saturday.
The project was delayed several times due to some archeological finds, but will now be opening ahead of the Dec. 1 deadline.
A release from the city of Windsor warns lane closures are still to be expected while they complete the remainder of the work.
Work will continue into spring of 2018, according to the release.