The MTA says that construction and regular maintenance projects on Saturday and Sunday will result in service disruptions on 18 of the 20 lines that run on weekends.
The lines affected will be the 1 2 3 4 5 7 A C D E F J L M N Q R and SIR (Staten Island Railway).
The MTA says the work is part of a program designed to upgrade and maintain the tracks, stations and signal systems in order to provide riders with safe and reliable service.
The agency says rider who rely on these lines should allow for additional time.
For more information on subway disruptions that affect lines in your area, visit the MTA's website.