The $15 million project to replace a 1958 bridge near Route 1 has been completed early.

The area near Exit 9 on I-95 was expected to be closed for the project from Friday night until early Monday morning last weekend and this weekend, but the highway reopened on Sunday mornings both weekends.

Officials had feared the detours would lead to a traffic nightmare through Stamford, but residents and police said congestion was not too bad in the city last weekend

Gov. Ned Lamont praised the “flawless efforts” of crews to prevent significant traffic delays in the normally heavily congested area.

“We really must give applause to the DOT staff, construction crews and state and local law enforcement who were involved in this complex and innovative project,” he said in a press release.

Crews demolished two bridge spans that carry Route 1 over I-95 and installed new ones using what Lamont called an “innovative” construction method called accelerated bridge construction.

With traditional construction methods, a project of this scale would have taken two years to complete, leading to daily traffic delays, Lamont said.

The new method caused construction to be completed “in what felt like the blink of an eye,” Lamont said.

“A project of this magnitude could have resulted in a nightmare on the highway, but everyone involved did an excellent job of communicating to drivers that they should avoid the area, and they were able to complete their work expeditiously,” he said in his statement.

Joe Giulietti, commissioner of the state Department of Transportation, said he appreciated all those involved in the project.

“I must thank the men and women of the Connecticut DOT who worked so hard behind the scenes to put all the pieces in place for this major bridge replacement project to come together in such a precision fashion, and ahead of schedule,” he said in a statement. “The construction crews and our law enforcement partners deserve equal recognition and high praise for being an integral part of the team that made this project such a success for everyone, but also most notably we must thank our customers - the traveling public.”

O&G Industries, a business based out of Torrington, completed the project.