Lisa Gail Antkowiak, 29, of San Diego was in serious condition with head injuries and cuts in Sharp Memorial Hospital, a hospital spokeswoman said. David Peter Donati, 19, of San Diego was treated and released from Grossmont Hospital, a hospital spokeswoman said.
No charges have been filed. An investigation is continuing.
The first crash occurred at 11:05 p.m. Tuesday in the eastbound lanes of I-8 near Grossmont Summit in La Mesa when Antkowiak's car, traveling an estimated 95 m.p.h., hit the highway divider, skidded 100 feet and rolled several times, said CHP officer Rocky Rockwell.
Antkowiak was not wearing a seat belt and was thrown onto the highway, Rockwell said.
Another motorist, Joseph Seewa Shamman, 54, of La Mesa hit a tire that had come off Antkowiak's car, blew two of his own tires and ran over Antkowiak as she lay on the road, dragging her up to 15 feet, Rockwell said.
A third motorist, Anthony Mannero, 25, of La Mesa stopped and offered assistance to Antkowiak, but a fourth motorist, David Peter Donati, 19, of San Diego crashed into Mannero's car that was parked along the highway, Rockwell said.
When Mannero saw his car burst into flames, he ran over to Donati's car and, fearing that car also would ignite, kicked in the window and dragged the stunned Donati to safety and administered first aid, Rockwell said.
Other motorists will cellular telephones called police.
Traffic was slowed for about 30 minutes before the victims were transported to hospitals and the debris was removed from the highway, Rockwell said.