Rumble strips use vibration and sound to alert drowsy or inattentive drivers that they are

Answer: B — approaching a stop sign or signal

Rumble strips are designed to use vibration and sound to alert drowsy or inattentive drivers that they are approaching a stop sign or signal. These strips are located on the road surface leading up to intersections or areas where drivers need to come to a stop. They serve as a tactile and audible warning to remind drivers to reduce speed, pay attention, and be prepared to stop if necessary. The other options (nearing a scenic overlook, entering a high-traffic area, and crossing a state border) do not typically warrant the use of rumble strips for alerting drivers.