What is the purpose of a rumble strip?

The purpose of a rumble strip is to alert drivers through noise when driving too close to the edge of the roadway. Rumble strips are typically placed along the shoulder or centerline of the road and are designed to create a rough surface that produces vibrations and sound when a vehicle drives over them. This auditory and tactile feedback serves to warn drivers that they may be drifting out of their lane or approaching a dangerous area, thereby helping to prevent accidents and improve roadway safety.

In contrast, while other choices reference road functionality, they do not accurately capture the specific role of rumble strips. Enhancing road aesthetics does not relate to their purpose, nor do they indicate the end of a road or guide the driver towards the correct lane. Their primary function is focused on alerting drivers of potential danger, thereby improving overall safety on the road.