Metro

Infant is well trained

This little commuter took the express line.

A 24-year-old woman delivered a healthy baby boy on the J train by herself early yesterday — after she went into labor five days early.

Wanda Dueno was headed to her sister’s home in The Bronx after visiting friends in Queens at about 1:30 a.m. when she realized that her baby wasn’t going to wait.

“I was trying to keep him in,” Dueno told The Post from the maternity ward at New York Downtown Hospital.

Little 7-pound, 2-ounce Libasse Dueno was born as the train was pulling into the Chambers Street station.

“No one was there. I was the only one on the train,” said Dueno, who also has a 1-year-old son.

When contractions started, she hit the emergency intercom button on the subway wall — but by the time a conductor arrived a few minutes later it was over.

“I already had him in my hands,” Dueno said while holding her bubbly son.

Her family was shocked.

“She called to say she had the baby on the train. I was like, ‘What! You had the baby on the train? You’re lying,’ ” said Wanda’s mom, Charlotte Mbaye, who rushed to be by her daughter’s side.

“I would have been scared!” added Wanda’s sister Porcha Banks, who was also at the hospital.

And even though Wanda has named her son, she’s open to nickname suggestions.

“You could call him . . . MetroCard?” Banks suggested.

MTA chief Joseph Lhota made the “joyous announcement” at yesterday’s agency meeting, saying, “I’m looking forward to meeting this little baby,” who he joked should have been named “Metro.”

Wanda, a New York City native who now lives in Philadelphia, was visiting relatives for her birthday next Monday.

Her sister, who also has children, was envious of the speedy birth.

“You had one a year ago and now you have another one and he comes out so easy. You’re good!” Banks joked. “I wish mine was easy like that!”

Transit officials temporarily halted service to clean the subway car.