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(KSL News) -- An overturned semi clogged rush-hour traffic today on Interstate 15, near Layton Hills Mall.
![Big Rig Accident Shuts Down I-15](https://img.ksl.com/ksl/1/100/10012.jpg?filter=kslv2/inline_lg)
Troopers say a car merging into northbound traffic collided with a semi-trailer.
The semi rolled over, blocking all northbound lanes for two hours.
The road wasn't completely cleared until about 9 p.m.
The truck was carrying food products that had to be unloaded before it could be moved.
![modal](https://img.ksl.com/slc/2548/254870/25487033.jpg)