Straphangers who use the N train on the Sea Beach Line in Brooklyn got Manhattan-bound service back Monday.
The Manhattan-bound platforms of nine stops in Sunset Park and Bensonhurst had been undergoing an extensive makeover since January 2016.
The upgrades include new platforms, staircases and canopies.
Two of the stations will also be accessible to disabled riders.
"I should have slept a little later. I get there like 20 minutes earlier taking the N as opposed to the D. It's like stopping and going, so a good thing," said one rider.
With the good news comes some bad, as the other half of the project starts in July, when crews begin renovating the Coney Island-bound platforms. That work is expected to finish in 2020.