The MTA's FASTRACK maintenance program comes to the N, Q, R and W lines this week.

Repair work started Monday night and takes place for the following three nights.

It is scheduled to run from 9:30 p.m. until 5 a.m. each evening and wraps up Friday morning.

N trains are slated to run only between Ditmars Boulevard and Queensboro Plaza in Queens and between Stillwell Avenue and Court Street in Brooklyn.

The Q will be rerouted to the D and F lines in Manhattan and Brooklyn.

Service on the R and W lines ends early in Manhattan and Queens each night.

For travel alternatives, visit the MTA's website.