A 20-year-old man was killed in a collision with a tractor-trailer rig Friday afternoon west of Waterloo, according to the DeKalb County Sheriff’s Department.

Derek M. Garman of Waterloo suffered “massive head trauma” and died from his injuries, the sheriff’s department said.

About 12:50 p.m., Garman was driving east on U.S. 6, just east of County Road 24, in a 2000 Jeep Cherokee when the vehicle crossed the centerline and struck the westbound rig’s trailer.

The truck driver, Robert A. Meyer, 59, of Fort Wayne, had drifted to the right in an attempt to prevent a collision, but could not avoid the Jeep, the sheriff’s department said.

Meyer was not hurt. A passenger in the Jeep, Richard M. Phillips, 18, of Waterloo, may have had broken ribs in the crash, the sheriff’s department said.

The driver’s side of the Jeep sustained extensive damage, and the rig’s axle received minor damage, the sheriff’s department said.

aingersoll@jg.net