Statistical model of in-vehicle sound generated from highway rumble strips
by Eric T. Donnell, H. Joseph Sommer, Philip M. Garvey, Scott C. Himes, Darren J. Torbic
International Journal of Vehicle Noise and Vibration (IJVNV), Vol. 5, No. 4, 2009

Abstract: Shoulder and centreline rumble strips are used on highways in the USA to prevent single-vehicle run-off-road and opposite direction crashes. Both rumble strip types have been shown to provide positive safety benefits on a variety of roadway types. The elevated in-vehicle sound and vibration levels produced by rumble strip patterns provide the alerting properties to warn drivers that their vehicles have left the intended travel lane. This study estimated a model of in-vehicle sound intensity, frequency, and duration using seemingly unrelated regression. The statistical model indicates that increasing the vehicle speed; rumble strip length, width, and groove depth; and using a milled versus a rolled rumble strip pattern, all increase the in-vehicle sound level relative to the ambient level. A rumble strip on the right-side of the travel lane; increasing the vehicle angle of departure; increasing the centre-to-centre spacing of the grooves; a concrete roadway surface; and a wet roadway surface, all decrease the in-vehicle sound relative to the ambient sound.

Online publication date: Thu, 21-Jan-2010

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