TOLEDO (WTOL) - Two men are injured following a traffic accident that shut down US 23 just north of the state line in Michigan on Tuesday.

OSHP received a call that a semi had broken down and was later hit by a vehicle.

A preliminary investigation revealed that a 40-year-old Dundee, Michigan man was operating a black 2011 Dodge Ram pick-up and was headed northbound on US-23 in the left travel lane.

A 2014 Volvo Semi tractor/trailer, operated by a 32-year-old South Sioux City, Nebraska man, was disabled along the left shoulder of northbound US-23.

The Dodge Ram pick-up struck the right rear corner of the semi trailer, causing significant damage to both vehicles and severely injuring the driver of the pick-up.

The driver of the semi tractor/ trailer received minor injuries during the crash and was transported to Flower Hospital.

The driver of the pick-up was transported by air ambulance to St. Vincent’s Hospital in critical condition.

Currently, it is unknown if alcohol, excessive speed or cell phone use was a factor in the crash.

The driver of the pick-up was wearing a safety belt at the time, but the driver of the semi was not wearing a belt since he was stopped.

The crash remains under investigation.