According to WKRN, the crash occurred on Interstate 65 in Bonnieville at around 8:40 am. The passenger bus, four trucks, and several passenger cars were involved in the chain-reaction crash.
Police say the crash began when a 2007 Volvo tractor-trailer collided with a safety patrol truck from the Kentucky Transportation cabinet which was parked in the emergency lane with its lights flashing. The tractor-trailer then struck a parked service truck, forcing the service truck into a Greyhound bus.
A second commercial truck struck the Volvo tractor-trailer.
21 people were transported to the hospital, including at least one child.
The following information was provided by the U.S. Department of Transportation: