In which situation is it permissible to drive in the left lane on a multi-lane highway?

Driving in the left lane on a multi-lane highway is generally reserved for specific situations, and one valid scenario is to avoid an obstruction. When you encounter an obstacle, such as debris, a broken-down vehicle, or any other hazard in the right lane, shifting into the left lane is an appropriate response to ensure your own safety and maintain the flow of traffic. This maneuver allows you to navigate around the obstruction while minimizing disruption to others on the road.

Situations like driving for any reason or during rush hour do not typically justify sustained use of the left lane; the left lane is meant primarily for passing slower vehicles. Meanwhile, preparing to exit is also not a valid reason to be in the left lane unless you're making a left turn or the exit approaches from the left side, as the right lane is generally where drivers should be positioned for most exits.