FLAGSTAFF – A single-vehicle accident occurred on Wednesday resulting in a serious injury on Snowbowl road.

At approximately 4:58 pm the Coconino County Sheriff’s Office received a report of a traffic collision on Snowbowl Road in the area of mile post 3.4. Upon arrival Deputies found a Freightliner flatbed utility truck rolled over.

The investigation of Deputies revealed that the truck was owned by Allison Transmission from Indiana, and was being driven to test transmissions installed in commercial vehicles. Both occupants of the vehicle were also from Indiana. One occupant was trapped in the cab and required extrication by Summit Fire District responders.

The 23 year old driver and the 21 year old passenger were transported to Flagstaff Medical Center by Guardian Medical Transport. Forest Service and Arizona Department of Public Safety also assisted in the response to this incident.

The passenger sustained non-life threatening injuries and the driver is in critical condition. No cargo was being carried by the truck. Investigation of the roll-over event is ongoing with the assistance of the Arizona Department of Public Safety.