OKLAHOMA CITY - Two people were injured in a head-on collision in northwest Oklahoma City, Tuesday morning.

According to authorities, crews responded to the two-vehicle collision involving a Jeep and a pickup truck at Hefner Road and Piedmont Road. Piedmont Road was shut down in both directions as authorities investigated the crash. 

Authorities said one vehicle crossed the center line, hitting the other vehicle head-on. 

The driver of the vehicle that crossed the center line was transported to the hospital by a medical helicopter. That driver is in critical condition.

The other driver suffered non-life-threatening injuries.