On a multi-lane highway, what is the correct lane for slower traffic?

The right lane is designated for slower traffic on multi-lane highways because it allows faster-moving vehicles to overtake on the left. This arrangement promotes smoother traffic flow and enhances safety by minimizing the chances of rear-end collisions that may occur when slower vehicles occupy lanes intended for higher speeds. The right lane typically serves as a merging lane as well, making it the most appropriate lane for vehicles that are not traveling at highway speeds or are preparing to exit. This convention encourages efficient usage of the highway and ensures that faster vehicles can navigate around slower-moving traffic without unnecessary hindrances. Keeping slower traffic in the right lane helps maintain overall traffic harmony and reduces congestion in the other lanes that are better suited for higher-speed travel.