Road structure – process – or apparatus – Pavement
Reexamination Certificate
2007-10-16
2007-10-16
Hartmann, Gary S. (Department: 3671)
Road structure, process, or apparatus
Pavement
C404S071000, C404S072000
Reexamination Certificate
active
11416816
ABSTRACT:
A method for reducing tire to road noise generated by vehicles on a road surface comprises generating a pseudorandom unique line pattern, providing said pattern as transverse grooves disposed in the road surface, said grooves being randomized according said line pattern as to one or more of position, frequency, and depth so as to spread the noise spectrum thereby reducing the amplitude or volume of noise generated at any single frequency and are capable of dramatic reductions in noise generated by high speed traffic on roadways. It can be implemented by conventional construction practice at little or no additional cost and eliminates the need for costly structures such as noise barrier fencing in residential areas.
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‘Evaluation of Tining Widths to Reduce Noise of Concrete Runways, Final Report,’ North Dakota Department of Transportation Materials and Research Division, Nov. 1997 (22 pages).
‘Special Report, Concrete Pavement Technology & Research,’ American Concrete Pavement Association, 2000 (12 pages).
‘Notes to the Specification for Improvement of Pavment Macrotexture,’ Transit New Zealand Ararau Aotearoa, 2003 (4 pages).
Kuemmel et al., “Noise and Texture on PCC Pavements”, Final-Report WI/SPR-08-99, written for the Wisconsin Dept. of Transportation, Madison, WI, Jun. 2000.
Banner & Witcoff , Ltd.
Hartmann Gary S.
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