Transit employees inspected signals, replaced rails and ties, scraped roadbeds, cleaned stations and painted areas impossible to reach during normal train operation. Workers also cleaned lighting fixtures, changed bulbs and repaired platform edges while performing intense levels of station cleaning, including the removal of tons of refuse.

During the four-night series of shutdowns, more than 800 maintenance workers each night completing hundreds of tasks, an effort that would have taken months under normal operations.

The next FASTRACK overnight closure will be on the Lexington Avenue 4 , 5 and 6 lines from Grand Central-42nd Street to Atlantic Avenue-Barclays Center for three consecutive nights beginning Monday, September 3.