(WHAS11) -- The morning commute was dangerous in some spots around Kentuckiana Friday morning.
Slick roads caused several fender benders and traffic was bumper to bumper on the Sherman Minton Bridge headed north.
Around 2:30 a.m. there was a fatal crash involving a semi-truck on I-65 North near the Scott County line. Somehow the driver lost control and hit the median. The tractor-trailer slid down onto US-31 below.
"It appears that the trailer came unhinged or unhooked from the tractor. Then the trailer slid on top of the tractor, crushing the tractor," Indiana State Police Trooper, Christopher Clancy said.
The tragic accident forced lanes to shut down for several hours.
In downtown Louisville, crews cleared a seven car pile up here at the Brook street exit. It was also slow going at the hospital curve with plenty of salt spread to clear slick spots.
The identity of the semi truck driver has not been released. Several drivers suffered minor injuries in the other crashes.
Police say it is hard to see slick spots at bridges and overpasses but those are the areas that freeze first.