Starting Monday, the Metropolitan Transportation Authority says they will close some Manhattan subway stations along the No. 4, 5, and 6 lines for repairs. 

The project will take place every day for the next three weeks and will end on Aug. 31. Workers will replace switches and tracks, as well as conduct tunnel repairs. 

They say it’s in an effort to reduce delays and improve reliability in Brooklyn, the Bronx and Manhattan. 

The overnight and weekend suspension begins at 9:30 p.m. with No. 4, 5, and 6 trains in Manhattan closing south of 42nd Street at Grand Central. 

However, they will reopen at 5 a.m. when the rest of the subway system opens after nightly cleaning because of the coronavirus pandemic. 

All Brooklyn stations will stay open but will be serviced by the No. 2 and 3 trains instead. 

In a press release, the New York City Transit Interim President, Sarah Feinberg says, “Our fiscal crisis and the COVID-19 pandemic are real challenges, but they’re not going to stop us from performing this critical project to improve the reliability, performance, and safety of our system for riders in Brooklyn, the Bronx, and Manhattan. We’re working to make sure this work causes as few disruptions as possible for our customers and look forward to getting this vital project started.”