Straphangers who take the N, Q or R lines at night will need to find another way around this week.
There will be no service in Manhattan on any of the three lines from 10 p.m. through 5 a.m. tonight through Friday morning.
This is the Metropolitan Transportation Authority's latest "Fastrack" project.
N trains will only run in Queens and Brooklyn.
Q trains will run in Brooklyn but will be rerouted to the D line in Manhattan to and from the 57th street station.
R train service will end early in Manhattan and Queens.
For travel alternatives, visit mta.info.