South Carolina Driver's Permit Practice Exam – Prep, Practice Test & Study Guide

Slower traffic should use the rightmost lane on highways with four or more lanes. This guideline is in place to promote smooth traffic flow and safety. The rightmost lane is typically designated for vehicles traveling at lower speeds, allowing faster-moving traffic to utilize the left lanes. This arrangement helps to minimize disruptions and reduces the chances of collisions, as faster vehicles can more easily overtake slower ones in the left lanes without having to deal with frequent changes in speed. This traffic regulation benefits all drivers by promoting a more organized and efficient movement of vehicles on the highway.