"hard to see at night if you don't know the area".
From Mrytle to Rocky Mount is over 210 miles...would have been driving closer to 4 hours at that point. They could have been run off the road as well.
Somebody called 911 and reported a collision...
and winter time with the heater on in the car, easy to get drowsy... and if his wife is like me, goes to sleep and leaves the husband to drive.
I checked Mapquest and Rocky Mount is 3-hours, 55-minutes from Myrtle Beach. So the sun would have been up around 7:30 or so and they left their home around 4.