How do Rumble Strips warn drivers that they are drifting out of their lanes?

Rumble strips are designed as a safety feature to alert drivers when they are veering out of their lanes. The correct response highlights that these strips produce both a rumbling noise and a tactile vibration felt through the vehicle when the tires roll over them. This dual alert system effectively captures the driver's attention, making them aware that they may be drifting from their intended path. The rumble noise serves as an audio cue, while the tactile feedback helps reinforce that alert, making it more likely for the driver to correct their course before drifting too far.

In contrast, the other options do not accurately describe the function of rumble strips. Grinding down tire tread or creating a screeching sound with no accompanying tactile feedback would not effectively alert a driver in the same way. Rumble strips are specifically designed to provide immediate sensory feedback to prevent accidents, making the first choice the best representation of their purpose.