A Biddeford man suffered life-threatening injuries after losing control of his Mercury Marquis on a Maine Turnpike exit ramp in Portland early Sunday morning, police said.

The car, operated by Tamer Tilahun, 24, was traveling along the southbound Rand Road ramp of Exit 47 in Portland when he lost control of the vehicle, said Stephen McCausland, spokesman for the Maine State Police.

Tilahun’s car hit a guardrail on the left side of the ramp. The impact sent his car careening across the roadway and up a snowbank. The vehicle went over the top of the snowbank, dropping several feet before landing on its roof in a snowbank next to the Maine Turnpike.

McCausland said speed and alcohol are considered as factors in the crash. No other vehicles or people were involved, but McCausland said that Tilahun was taken to Maine Medical Center with serious injuries that are considered life-threatening. The accident was reported around 2:30 a.m. on snow-covered roads.

Tilahun was listed in critical condition Sunday night by a hospital spokeswoman.