Investigators believe speed was a factor in a single-car crash that sent a 90-year-old Redmond woman to Harborview Medical Center in Seattle with serious injuries Monday afternoon, according to a Redmond Police Department (RPD) press release.

The woman, who suffered injuries to her ankle, wrist and ribs, is currently in serious condition at Harborview’s intensive care unit, a hospital spokesperson told the Reporter Tuesday morning.

The woman was driving a 1994 Honda Accord southbound on 160th Avenue Northeast when she failed to make a right turn on Northeast 55th Way, the press release said. After failing to make the turn, the car ran into a rocky embankment and flipped before landing upright just inches from a home.

The collision is currently under investigation by the RPD’s Traffic Unit, which has been unable to estimate how fast the car was traveling when it failed to make the turn, according to police spokesman Jim Bove.

“We will not be able to determine how fast the car was traveling because what she hit was not stable,” Bove said. “Since it moved there’s likely no way to calculate an exact speed and even if we did, it wouldn’t be conclusive.”

Bove said investigators are having the car inspected to see if there were any mechanical problems before the collision occurred.