The eastbound lanes of Innes Road were closed east of the Blackburn Hamlet Bypass after a watermain broke.
The section of road remained closed until Tuesday afternoon, Ottawa police said.
Eastbound traffic is being diverted into Blackburn Hamlet.
The broken water main was reported on Innes Road near Orleans Boulevard early Tuesday morning. Excess water caused the asphalt to buckle.
Westbound traffic was not affected.