The MTA's "Fastrack" maintenance program is coming to the 2 and 3 lines this week.
Starting Monday night and for the next three nights, the 2 train will operate in two sections.
In the Bronx, it will run between Wakefield-241st Street and 3rd Ave-149th Street.
Southbound trains will skip Jackson Avenue.
The other section runs between 96th Street in Manhattan and Flatbush Avenue-Brooklyn College.
Number 3 trains will be suspended completely.
Shuttle buses will be available.
The changes are in effect each night from 10 p.m. to 5 a.m., and the work it set to end Friday morning.
The same service changes will also take place next week.
For more information, visit mta.info.