Wednesday afternoon’s head-on collision between a Chevrolet Cavalier and a Chevrolet Impala in the 8300 block of Highway 70 critically injured the driver of the Cavalier, Dylan Boldus, 18, of Charlotte, Tennessee.

The investigation to this point shows that the Impala was traveling south on Highway 70 at 12:20 p.m. when it crossed the double yellow line and crashed into the northbound Cavalier. The driver of the Impala, William Graves, 33, also of Charlotte, Tennessee, told investigators he had worked until early this morning and at the time of the crash had fallen asleep behind the wheel. Boldus and Graves were both transported to Vanderbilt University Medical Center. Graves, who wore a seatbelt, is in stable condition. Boldus, who was not wearing a seatbelt, remains in critical condition.

There was no evidence of alcohol or drug involvement at the scene.