The MTA got an A+ as it nears completion of the Second Avenue Subway's first phase.
Congresswoman Carolyn Maloney gave the agency the top grade in her final report card.
She championed the MTA's progress, which she says is 98 percent complete.
"This is going to improve the quality of life of all commuters here on the East Side, and I would say it will be a huge economic boon to the economy of our city and especially to the economy on the East Side," Maloney said.
Four stations along the new Q lines are expected to be up and running by the end of December.
Maloney says 200,000 riders are expected to use the new subway on a daily basis.