What function do rumble strips serve?

Rumble strips serve an important safety function by alerting drivers through both vibration and sound. These strips, which are usually made of grooves or textured patterns on the road, are designed to create a tactile and audible warning when a vehicle rolls over them. This is especially effective in situations where drivers may become distracted or drowsy, as the vibration can encourage them to regain focus on the roadway.

The use of rumble strips is strategically placed in areas such as the edges of highways or near intersections to warn drivers when they are veering off the road or approaching a stop sign or signal. Their purpose is to enhance road safety and reduce accidents caused by inattentiveness or dozing off while driving.

The other options do not accurately describe the primary function of rumble strips. Speed bump indicators would generally involve signage rather than road texture, bicycle lane markings would be created with paint rather than rumble strips, and stop signal indicators would typically use traffic signs or signals rather than texture on the road surface.