What feature creates a loud noise if a vehicle drifts to the edge of the road?

The feature that creates a loud noise when a vehicle drifts to the edge of the road is rumble strips. These strips are typically installed on highway shoulders or at the centerlines of roads to alert drivers when they are unintentionally veering out of their lane. When a vehicle's tires travel over rumble strips, the vibrations and noise serve as an effective wake-up call, heightening drivers' awareness and alerting them to potential loss of control.

In this context, the other terms provided do not refer to this specific traffic safety feature. Belch lines are not a recognized term in traffic safety. Wake-up tracks and vehiquakes do not have any established meaning related to roadway safety or driver alertness. Rumble strips play a crucial role in reducing accidents by helping to prevent driver distraction or drowsiness.