APEX, N.C. (WTVD) -- An overturned tractor-trailer closed the southbound lanes of US 1 in Apex on Tuesday afternoon.
The incident happened before 12 p.m. on US 1 near I-540.
A pickup truck towing a small trailer slowed due to a possible mechanical issue in the left lane of US 1. The pickup was still partially in the roadway when it was struck from behind by a tractor-trailer hauling used oil filters from Noble Oil Company.
The driver of the pickup was not injured.
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The driver of the tractor-trailer sustained serious injuries and was flown to Duke University Hospital.
The roadway is expected to remain closed southbound until 3:00 p.m.
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A detour is in place and one lane of US 1 north is closed.