Bronson Avenue will re-open from Catherine Street to Gladstone Avenue tonight at midnight.
Traffic will be contained to one lane each way and bus service will resume on Bronson Avenue in time for Tuesday morning rush hour.
The re-opening is a welcome early surprise, as construction wasn't expected to finish until December.
The stretch of road from Gladstone Avenue to Somerset Street will remain closed.
The road has been closed since March as part of a $30-million project to replace water and sewer pipes – some of which are 130 years old. During this two-year initiative, the city's contractors are to install a large new water main, improve cycling in the area, plant new trees, and rebuild deteriorating roadways and sidewalks.
The Bronson Avenue renewal is part of the greater Ottawa on the Move project that will inject $340 million into city infrastructure.