GLENWOOD CANYON, Colo. (KKCO) -- Colorado State Patrol investigators are trying to narrow down possible causes for a fatal crash on I-70 Wednesday.
In a release, Trooper Graham Thorne says driver fatigue is the possible reason a woman driving a Mazda through Glenwood Canyon drifted into the opposite lane and hit a semi truck head-on.
The crash happened on May 22 around 4:30 a.m. at I-70 milemarker 127, which is in a construction zone.
After the vehicles collided, both burst into flames. Three people were rescued from the Mazda, but the driver was killed in the incident. Her identity has not been released.
The driver of the tractor trailer as not injured.
The 53-year-old male Mazda passenger is in moderate condition at Valley View Hospital in Vail. The 25-year-old woman and four-year-old boy who were sitting in the Mazda's backseat have transported to Denver hospitals. They are both in serious condition.
Thorne says impairment by prescribed medication is considered a factor in the crash, but toxicology reports by the coroner have not been completed.
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