03/01/2012 12:50 pm ET

MTA Fastrack Working On Sixth Avenue Line (PHOTOS)

Earlier this year, the MTA began its first round of weeknight shutdowns to accommodate repairs and construction for its Fastrack plan. While many groaned at the inconvenience and unprecedented shift from the usual 24-hour service, some neat photos are proving the agency is actually doing serious work while we snooze.

The large-scale, nightly shutdowns allow for 800 MTA workers to be unleashed underground to do all kinds of inspections, repairs, renovations, you name it so that the agency can "clean house." If they put these pictures to music it would make a great makeover montage.

Check out the photos below for a glimpse at the MTA doing their thing on the Sixth Avenue line: