Rumble strips (also known as sleeper lines or alert strips) are a road safety feature to alert inattentive drivers of potential danger, by causing a tactile vibration and audible rumbling transmitted through the wheels into the vehicle interior.What is the purpose of rumble strips?
Rumble strips are intended to save lives and prevent serious injuries by alerting drivers that they are leaving the driving lane. They consist of raised or grooved patterns on the roadway. They provide driver with both an audible warning (rumbling sound) and a physical vibration.What are rumble strips used for in streets?
Portable rumble strips, also called Andreas strips, can be used to alert traffic to upcoming lane closures or road works to prevent collision with signage and barriers. Shoulder and centerline rumble strips are used to reduce lane departure crashes.