On a multi-lane road, which lane is typically used for faster vehicles?

The left lane on a multi-lane road is typically designated for faster-moving vehicles. This is because it allows for overtaking slower vehicles that are usually in the right lane. The left lane serves the purpose of facilitating quicker traffic flow, especially on highways or roads where maintaining a higher speed is necessary for efficiency and safety.

In many driving regulations around the world, including South Korea, it is standard practice to keep the left lane clear for faster traffic while the right lane is used for slower-moving vehicles or for those preparing to exit the road. As such, drivers are encouraged to use the left lane for passing or when traveling at a higher speed, ensuring that traffic can move smoothly and reducing the likelihood of accidents caused by abrupt lane changes or slower vehicles occupying the faster lanes.