By the end of February, the MTA believes the long-awaited 7 train extension to Manhattan's westside will be open.
A video produced by the agency is on the internet.
A bonus and penalty program were announced at this month's MTA board meeting for the company.
The $2 billion dollar project was funded by the city as part of former Mayor Mike Bloomberg's plans to redevelop the Hudson Yards. The extension will add one station to the 7 line at 34th Street and 11th Avenue.
Crews blame project delays on problems with one-of-a-kind incline elevators and escalators.