What is the purpose of rumble strips?
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They are designed to make drivers speed up.
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They alert inattentive drivers through vibration and noise.
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They encourage drivers to slow down on multi-lane roads.
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They improve visibility of the road’s center line and edge line.
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Explanation
Rumble strips serve as an effective countermeasure against driver error by reducing run-off-road collisions through audible noise and physical vibration. When a vehicle crosses them, the combination of sound and vibratory warning alerts drowsy or distracted drivers, helping refocus their attention on maintaining proper lane position. These safety features-including shoulder, edge, and centerline rumble strips-are proven to enhance driver reaction times, ultimately decreasing crash severity on various road types, from freeways and multi-lane highways to two-lane rural routes.
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