A 15-year-old girl jumped out of a moving car during an argument with her mother on a Texas highway — and was fatally struck by another vehicle, authorities said.

The grisly chain of events unfolded on Interstate 45 in Harris County late Monday, sheriff officials told The Post.

The teen’s identity wasn’t immediately released.

"She was struck by a different vehicle that did not stop," Harris County Sheriff’s Deputy Thomas Gilliland said, adding the girl landed in an adjacent lane prior to being fatally hit. "A lot of folks were very traumatized with what happened."

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The girl’s mother is cooperating with investigators. It’s unclear what they were arguing about prior to the "distraught" teen’s decision to jump out of the moving car, Gilliland said.

"Obviously nothing worth that," he said.

The teen was pronounced dead at the scene, Harris County Sheriff Ed Gonzalez tweeted late Monday.

Traffic was diverted from the southbound lanes of the highway following the crash. The portion of I-45 later reopened for Tuesday’s morning rush hour, KHOU reported.

Investigators were working Tuesday to locate the driver who ran over the girl, Gilliland said, adding it’s possible that the person was unaware that they hit someone.

"We need to find that person and find out what happened," Gilliland said Tuesday. "Maybe they didn’t realize, but once they did strike [the girl], they should’ve realized it was a body and not debris or something."

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The driver who ran over the girl could potentially face a charge of leaving the scene of an accident. Investigators will turn over any evidence to a grand jury to determine if criminal charges in the incident are warranted, the deputy said.

"You may not have had time to stop, but once you run over a person, you really should stop," Gilliland said.

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