KNIGHTDALE (WTVD) --A serious crash happened Monday night in Wake County on I-540 near Highway 64.
A car flipped and wound up upside down in the median a little after 8:30 p.m.
Knightdale Police said a man was transported to WakeMed with serious injuries.
At one point, lanes in both directions were closed.
The cause of the crash remains under investigation.
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