Arizona Department of Public Safety troopers stopped a wrong-way driver on the new South Mountain Freeway on Thursday morning — the first since the freeway opened less than a week ago.

Bart Graves, a spokesperson for DPS, says two vehicles swerved out of the way and one hit the median wall.

"There were no reported injuries. Impairment is believed to be a factor. Driver of this wrong way vehicle will be a 17-year-old male," he said.

Graves says trooper arrived shortly after receiving calls about the driver. The teen was arrested.