CORTLAND, NY (CortacaToday) — The cause of a Cortland man’s death remains unknown. 

State Police say Dale Planck crashed early Saturday morning on I-81. According to authorities, the 53-year-old sideswiped a guiderail and drove across the highway, then came to a stop on the shoulder tree line. Troopers say Planck was unresponsive and was taken to Guthrie Cortland Medical Center, where he died.

Autopsy results are pending.