A 27-year-old woman gave birth Friday morning to a baby boy just off the outer loop of the Capital Beltway.

The woman, whose name was not released, was driving around 5 a.m. on the Beltway near the Route 123 exit in Tysons Corner when she called 911 for help because she started having contractions, according to police.

The birthing event was first reported by WTOP.

A Virginia State trooper was the first to get to the woman, and Fairfax County Fire crews arrived to take her to an area hospital.

But they didn’t quite make it.

With the woman in the back of an ambulance, crews had to pull over and deliver the baby.

“She started to complain of stronger and stronger and more frequent contractions,” said Dan Schmidt, a spokesman for the Fairfax County Fire and Rescue Department.

He said crews delivered the baby about three miles from Inova Fairfax Hospital. It is the mother’s third child, and she and the newborn are doing fine, authorities said.

The Beltway isn’t the only non-traditional spot for a birth.

In August, a 23-year-old District woman gave birth at Metro’s L’Enfant Plaza stop. The baby boy, Amir Mason, was quickly dubbed “Metro baby” on social media outlets. Many on commenters noted the appropriateness of his birthplace — “l’enfant” is French for “the child.”

His mother, Shavonnte Taylor, was taking the subway from her home in Southeast to an obstetrician’s appointment near the Foggy Bottom station when she noticed she was having contractions. She stepped out of a Green Line train and tried to head to the platform for Orange and Blue Line trains, but she didn’t make it very far when she began having strong contractions.

A licensed emergency medical technician from Dumfries who was nearby heard her screaming and came to help. She delivered the baby near the Seventh Street and Maryland Avenue exit in a darkened area next to a broken escalator.