A man was fatally injured during a crash in Montgomery County.

67-year-old Allen Chism was westbound on U166 highway west of County Road 5900 driving a semi-truck when for an unknown reason Chism left the roadway on the north side and entered the north ditch. Chism continued westbound and crossed over a driveway entrance. After crossing the driveway, the trailer tipped over causing the power unit to tip over onto its right side. Chism was not wearing a seatbelt and was ejected from the vehicle and killed upon impact.