The $395.7 million project will upgrade a total of nine stations with new platforms, lighting and stairs, according to the MTA. Two of the stations will also get elevators and ramps to make them accessible to people with disabilities.
During the work, trains will run express from Eighth Avenue to Coney Island, skipping the Fort Hamilton Parkway, New Utrecht Avenue, 18th Avenue, 20th Avenue, Kings Highway, Avenue U and 86th Street stations.
Riders going to those stations can take an N train to Bay Parkway or Coney Island and transfer to a Manhattan-bound train.
Eighth Avenue and Bay Parkway will also have work done, but trains will continue to stop at temporary platforms in the middle of the track.
Renovation work on the Manhattan-bound platforms was completed on May 22.
The project was funded through the MTA’s 2010 to 2014 capital program.