Shuaniya Rogers, 24, was suspected of driving under the influence when she crashed her minivan into the center divide of a highway northeast of Oakland, California, police told KNTV-TV.
Along for the ride Monday night was Rogers' 2-year-old daughter.
What happened police are calling miraculous.
Rogers took her daughter out of the vehicle and attempted to cross all the lanes of Highway 24 in Orinda, police said.
The pair were then struck by the driver of a Mercedes-Benz, who fled the scene and is wanted by California Highway Patrol, authorities told the San Jose Mercury News.
Despite sustaining major injuries, Rogers and her daughter managed to crawl to the shoulder without getting hit again, CHP Officer John Fransen told the Mercury News.
"Luckily they were close enough to the right shoulder," Fransen told the paper. "Not to be killed on impact was remarkable."
When they arrived on the scene, police at first found only an empty vehicle, KNTV noted — then they heard the little girl's cries.
"He heard some noise that ultimately drew him over to the right shoulder," Fransen told the station. "That's when he noticed the small child. Once they went over there they saw the mother."
But the harrowing night was far from over.
The girl had a badly injured foot and was in danger of losing it. But Fransen credited the hospital and the quick actions of two CHP officers, Nate Johnson and Randy Vigus, with helping save the toddler's foot, the Mercury News said.
"Sometimes miracles happen," Fransen told the Mercury News. "I think a miracle happened for that little girl."
He added to KNTV that Rogers will probably be charged with driving while intoxicated and child endangerment.