Disregarding a railroad symbol will result in the addition of points to a south carolina driving record.

I believe the answer is 4 points.
The amount of penalties that given for driving violations in south carolina tend to get bigger as the point increases.
The highest points are given to Reckless driving which resulted in additional 6 point and Leaving the scene of an accident resulting in property damage which resulted in additional 6  points too.

South Carolina has complicated driving regulations and a complex system for determining the number of points added to a driver's record for various infractions. Disregarding a railroad symbol will result in the addition of 4 points to a South Carolina driving record.