BROOKLYN - Straphangers are being warned of major services changes as the MTA shuts down some trains for overnight repairs this week.

Starting tonight, service on Lexington Avenue's 4, 5 and 6 lines will be suspended from 10 p.m. to 5 a.m. from Atlantic Terminal in Brooklyn to Grand Central until Friday.

The MTA says more than 300 maintenance workers will be performing a number of tasks from power washing platforms to replacing track components as part of its FastTrack program.

Officials say to add at least 20 minutes to your travel time or use alternate routes.