San Diego, Calif. -

A baby boy was born early Thursday in a pickup truck stopped on the side of Interstate 15, authorities said.

"The head was already crowning and I had (my wife) in the front seat," said Dave Atkinson, the baby's father. "I was panicking a little bit because she was screaming at the top of her lungs."

Atkinson's wife went into labor as he was driving her to UC San Diego Medical Center. Atkinson pulled over to the shoulder of the southbound lanes near Ted Williams Parkway and called 911. Paramedics arrived and helped deliver a baby boy in the front seat of the pickup.

"I said to her to hold on, try and hold on a little longer but she said no way -- pull over and call 911," Atkinson said.

The mother and child were taken to Sharp Mary Birch Hospital by ambulance. California Highway Patrol officers directed traffic around the stopped vehicle.

KSWB spoke with the father by telephone at the hospital. He said their 10-pound son is named Hank, and both mother and baby are doing well. Hank is her fourth child.

Hank's mother, Katie Ashcraft, had been scheduled to have a cesarean section later this month because of the size of the baby, but Hank apparently could not wait.