According to police reports, the woman was walking on the sidewalk and heading north on 104th Ave SE within the 24100 block.
"As she crossed a driveway and in front of a vehicle that was waiting to make a right hand turn and enter the roadway, the vehicle pulled out from the driveway and collided with the woman," Sergeant Jarod Kasner said.
The 48-year-old uninjured driver stayed on-scene while emergency crews were called to aid the woman. Crews stabilized the woman, describing her injuries as life-threatening.
Traffic Investigators determined there was no evidence that drugs or alcohol was involved, and are continuing to review evidence before a decision for charges is made.