On an expressway, what is the left lane generally used for?

The left lane on an expressway is primarily designated for passing slower vehicles and allowing faster traffic to move by. This lane enables drivers to overtake other cars safely, as it is typically intended for those who are traveling at higher speeds. When using the expressway, maintaining a consistent speed and staying in the right lanes is encouraged unless you are actively passing another vehicle. This practice not only enhances the flow of traffic but also contributes to overall safety on the roadway.

While the other options might represent different actions that can occur on the road or expressway, they do not align with the primary purpose of the left lane. Driving below the speed limit is generally discouraged in the left lane due to the potential to create dangerous situations for faster vehicles. Exiting the expressway commonly occurs in the right lane, which is better suited for merging and leaving the highway. Parking is not permitted on expressways, particularly in fast-moving lanes, as it poses a significant hazard to both the driver and other road users.