When passing on the right is permitted.

S.C. Code Ann. § 56-5-1850
in effect
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(a) The driver of a vehicle may overtake and pass upon the right of another vehicle only under the following conditions: 1. When the vehicle overtaken is making or about to make a left turn. 2. Upon a roadway with unobstructed pavement of sufficient width for two or more lines of vehicles moving lawfully in the direction being travelled by the overtaking vehicle. (b) The driver of a vehicle may overtake and pass another vehicle upon the right only under conditions permitting such movement in safety. Such movement shall not be made by driving off the roadway.
Source: Open US Law by Vaquill AI (CC BY 4.0)URL: https://www.scstatehouse.gov/code/t56c005.phpFetched: 10/17/2026