Phoenix fatal accident on Interstate 10 backs up morning traffic

11/15/12 - A young woman was struck and killed by a vehicle Thursday morning on westbound Interstate 10, forcing the closure of several lanes near the Seventh Street exit and causing traffic to back up for miles, officials said.
Only two lanes of the interstate were open at 6 a.m. However, all lanes were re-opened after 7 a.m., according to the Arizona Department of Public Safety.

Traffic was backed up more than two miles at one point in the morning as a result of the lane closures, according to Garin Groff, a spokesman for the Arizona Department of Transportation.

Delays are expected to continue throughout the morning commute, according to officials.

The collision occurred before 5:30 a.m. Tuesday morning. It was not immediately clear why the woman was on the freeway. She has not been identified by authorities.

The driver who struck the woman was not impaired at the time of the collision and is cooperating with the investigation, officials said.