The Metropolitan Transportation Authority's FASTRACK program will shut down parts of the A and C subway lines next week and the week after.
The trains won't run overnight, from 10 p.m. to 5 a.m., between Jay Street-Metrotech and Broadway Junction.
The service is suspended every weeknight from Monday, February 3 to Friday, February 7 and again from February 10 to February 14.
Free shuttle buses will fill in the service gaps.
The MTA shuts down the tracks so workers can do maintenance without being interrupted by passing trains.