The Metropolitan Transportation Authority is bringing its "Fastrack" maintenance program to the A, B, C and D lines in Manhattan and the Bronx this week.
Starting Monday night and for the following three nights A service will be suspended between 59th Street-Columbus Circle and 207th Street in Inwood.
There will also be no D service from 59th Street-Columbus Circle to 161st Street-Yankee Stadium.
B and C service will end early each night.
The work runs from 10 p.m. to 5 a.m. and is set to wrap up Friday morning.
For more information, go online to mta.info.