Effects of pavement surface texture on noise and frictional characteristics.
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1987-02-01
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Edition:Final report.
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Abstract:An experimental modification of the transverse groove
surface texture of a section of an urban interstate highway was
performed by the Iowa Department of Transportation. Transverse
groove texturing is a design feature required by the Federal
Highway Administration to reduce skidding under wet pavement
conditions. Adjacent residents claimed the texturing was the
cause of especially annoying tonal characteristics within the
traffic noise. A research proposal to modify the existing
texture pattern by surface grinding and to study the noise and
friction effects was approved for funding by the Iowa Highway
Research Board. Results in the form of a comparison between
traffic noise before modification and traffic noise immediately
after and 15 months after modification indicate that the change
in surface texture has lowered overall traffic noise levels by
reducing a high frequency component of the traffic noise
spectrum. Friction testing data show reduced capacity of the
roadway to inhibit wet pavement skidding as a result of the
surface modification.
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