OHIO TOWNSHIP (KDKA) – A tractor-trailer rollover had a big impact on traffic along Interstate 79 Tuesday.

According to emergency dispatchers, the incident happened on the southbound side of the road near the Mt. Nebo Road exit ramp and Glenfield interchange.

Two lanes were blocked in the area for much of the evening rush hour while crews worked to remove the rig.

Good Samaritans helped the truck driver escape from the wreckage. A fire broke out behind the cab after the rig overturned.

It is unclear what the tractor-trailer was hauling at this time.

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