The accident on westbound I-8 east of Taylor Street was reported at 4:43 a.m., according to California Highway Patrol Officer Tommy Doerr. The woman stepped into traffic lanes from the right shoulder and was struck by a 2008 Volkswagen Jetta, he said in a statement.
The driver, a 20-year-old San Diego woman, remained at the scene to be questioned, Doerr said.
“DUI was not a factor for the driver of the Volkswagen,” Doerr said. “The sobriety of the pedestrian has not been determined.”