What is the implication of a "Slower Traffic Keep Right" sign on highways?

The implication of a "Slower Traffic Keep Right" sign is primarily to enhance traffic flow on highways. This sign indicates that vehicles traveling at lower speeds should position themselves in the right lane, allowing faster-moving traffic to proceed without interruption. It encourages those who are driving at or below the speed limit to keep right so that they do not impede the progress of others who may be trying to pass in the left lane.

This practice not only helps maintain a smoother traffic flow but also contributes to overall road safety by minimizing the number of lane changes and potential conflicts that can occur when drivers are spread across all lanes regardless of their speed. By adhering to this guidance, all drivers can ensure a more predictable and efficient driving environment.

The other options may suggest different interpretations, but they do not align with the primary purpose of the sign: promoting safe and efficient traffic movement by encouraging slower vehicles to keep right.