A Nebraska man was killed in a semi-crash in Steuben County.

It happened early Tuesday night T U.S. 20 and County Road 20 North.

Investigators arrived to find the tractor-trailer ran  off the road, down an embankment.

Police found the driver’s side door open and the driver, 62-year-old Thomas Jamrock, partly outside the truck.

Jamrock was pronounced dead at the scene.

Investigators say that Jamrock left the roadway at a high rate of speed and collided with a guardrail before overturning.