CALGARY- A woman is fighting for her life in hospital after a serious crash Friday night on Deerfoot Trail.

Officers were called just before 8 p.m. after a vehicle rolled near the exit ramp at Southland Drive.

Witnesses called 911 saying the vehicle had been driving erratically, before losing control and smashing through a chain link fence.

The 52-year-old driver was transported to the Foothills Hospital in critical condition. No other occupants were in the vehicle.

Police say alcohol appears to be a factor in the crash.