Final answer:
The sign indicates that slower traffic should travel in a lane other than the farthest left lane.
Step-by-step explanation:
The sign displayed on highways with more than one lane of traffic traveling in the same direction indicates that slower traffic should travel in a lane other than the farthest left lane.
The purpose of this sign is to allow faster-moving vehicles to pass slower-moving vehicles by using the left lane. Keeping the left lane clear helps maintain a smooth flow of traffic and reduces the risk of accidents.
It's important to follow this rule for safe and efficient driving on multi-lane highways.