The Metropolitan Transportation Authority's "Fastrack" repairs are coming back to the East Side of Manhattan this week.
Starting Monday night and for the next three nights, all 4 and 5 trains will run on the local tracks while work is done on the express tracks.
The service changes will take place from 10 p.m. to 5 a.m., between 125th Street and Grand Central-42nd Street in both directions.
The work is set to end Friday morning.
Number 5 train service in Manhattan will end early each night, but will run normally in the Bronx all night between Dyre Avenue and East 180th Street.
For more information, visit MTA.info.