GLENDALE, Ariz. -- Four people are in the hospital after a head-on collision that closed a portion of Glendale Avenue in the West Valley early Tuesday morning.
It happened at about 1:30 a.m. at about 99th Avenue just west of Loop 101.
Aerial video from Chopper 3 showed a gray four-door sedan and a white four-door car, both with massive front-end damage. Debris was scattered all over the roadway.
Glendale police are trying to piece together the moments leading up to the collision, but they believe the gray car, which was traveling east, crossed into the opposite westbound lanes.
"Impairment is a factor on the part of the driver of the gray sedan," Officer Tracey Breeden of the Glendale Police Department wrote in an email to 3TV.
Investigators are working to determine if speed might have been an issue, as well.
The 25-year-old man who was driving the gray car suffered life-threatening injuries and was air-lifted to a local hospital.
Three people from the white car, all adults, were transported by ground ambulances. They are expected to recover.
Police were on the scene through the morning rush hour. Glendale Avenue was closed between 99th Avenue and Glen Harbor Boulevard to the west for hours.
3TV traffic reporter Gina Maravilla advised drivers to get around the closure by using Northern Avenue to the north and Camelback Road to the south. Bethany Home Road does not go through in that area.