The city’s summer of traffic torment will soon come to an end, after the governor and MassDOT officials announced work on the Sumner Tunnel is done enough that it will reopen on time this Friday.

Closed at the start of July, the 90-year-old tunnel connects the North End with Logan Airport and points beyond. Its closure, planned to allow construction crews 24-hour access to the tunnel for an interior roof replacement project, has meant a drive north that used to take a resident 10 minutes on Route 1A might instead take an hour through detours.

“After eight weeks of continuous, round the clock work, we are proud to announce the reopening of the Sumner Tunnel. This is on time and in time for our upcoming Labor Day weekend and the start of rush hour traffic,” Gov. Maura Healey said from inside the tunnel on Wednesday.

The governor was given a tour of the work done before she spoke, during which MassDOT Highway Administrator Jonathan Gulliver filled her in on the bits that still remain — like removing excess orange sealing grout from around the roof arches — to fully bring construction on the busy throughway to completion.

“This was a very, very challenging project,” Gulliver said afterwards.

Drivers who use the tunnel on Friday will be sure to notice the absence of the old drop ceiling tiles and their replacement with new molded concrete arches, which Gulliver said should extend the life of the tunnel by 50 years.

Gulliver showed the governor the ground level air intake shafts for the tunnel’s improved ventilation systems, which he said will move fresh air into and through the tunnel much more efficiently than before.

The tunnel is much more well lit than it was previously, with bright white light now filling the open space once occupied by 4,000 linear feet of exhaust stained ceiling tiles.

About 39,000 daily commuters and air travelers will have their regular route restored as a result of the project’s near completion, and every speaker Wednesday acknowledged their recent suffering.

“Commuters and the residents who had to change their approach, seek alternate routes, and took advantage of the various public transit services that we offered really helped make this a success and I want to thank them,” Gulliver said.

If everything before this sentence represents the good news, the bad news is that weekend closures will continue sporadically from now until next Summer, when another two-month-long closure is scheduled so that MassDOT can replace the tunnel’s asphalt decking and shore up underlying concrete.

That work was originally scheduled to be completed alongside the roof project, but that would have required the tunnel to close for four months. MassDOT announced in February it would split the projects between a pair of summers instead.

According to the governor, this year’s closure taught everyone a lot about how next year’s should go.

“What we’ve learned through this experience will help us only to shorten the time that we’re going to need to deal with the deck and ultimately make things go as quickly and as smoothly as possible,” Healey said. “I thank the public for their patience through this.”

While the tunnel has been closed the MBTA and Commuter rail have been offering discounted or free fares to impacted residents, a policy that will end on Friday when traffic resumes.

MBTA General Manager Phil Eng could not say Wednesday what the cost of lost revenue might be for offering the cheap or free rides, but he said the impact of the tunnel’s restoration on local commuters is worth the hit to the T’s bottom line.

“I would look at it this way: there are a lot of positives that came out of this effort,” he said. “The ability to show people that we can provide reliable service, that’s the best advertisement I can have for the T.”

The schedule of upcoming weekend closures was not made immediately available on Wednesday, though Gulliver said it would be published soon and that shutdowns would likely occur twice a month until the end of the year. The tunnel will not close this weekend, he said.

The full two year tunnel restoration project is expected to cost about $156.6 million.