Warren County is requesting the state add rumble strips along the highway on Harrison Ferry Mountain. The request comes after a sleeping motorist toppled a 300-foot communications tower.Rumble strips are grooves in the roadway or rows of raised pavement markers placed on the roadway in such a manner that, as the tires of a vehicle contact them, they produce sound and vibration to alert the driver.“If we had those rumble strips, it might have helped,” said Commissioner Randy England during a Highway and Bridge Committee meeting. If the state had put rumble strips there, we may not have lost the tower.”Being on a state route, the Tennessee Department of Transportation would make the final decision on placing rumble strips.