Special Weather Statement issued January 23 at 3:58AM EST by NWS Charleston SC

Low temperatures in the teens across many areas early this morning
will remain below freezing through mid to late morning. As a result,
many roadways will remain hazardous for travel with compact snow/ice,
including black ice. This includes primary roads, secondary roads,
and back roads, plus bridges, and overpasses.

Black ice is difficult to see and distinguish from dry surfaces.
The deceptive nature of black ice can catch you unaware while you
are driving or walking, causing you to lose control of your motor
vehicle, or to slip and fall.