What is the purpose of rumble strips on highways?

Rumble strips are specifically designed to enhance road safety by providing auditory and tactile feedback to drivers. When a vehicle drifts off the paved surface, the rumble strips create a noticeable noise and vibration. This feedback alerts the driver that they are unintentionally leaving the roadway, which can help prevent potential accidents. The design and placement of rumble strips are strategic, typically located along the edges of highways and at certain points in the road, to maximize their effectiveness in drawing attention and prompting corrective actions from drivers.

The other options provided do not accurately reflect the function of rumble strips. They are not meant to inform drivers about speed limits or traffic lights, nor are they intended to improve vehicle handling. Instead, their primary role is to enhance safety by alerting distracted drivers when they are straying from their lane.