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VEHICLE CATEGORY 35 MPH or Less Over 35 MPH <br /> Motor vehicles over 86 dB(A) 90 dB(A) <br /> 10,000 pounds GVWR or <br /> GCWR <br /> Motorcycles 80 dB(A) 84 dB(A) <br /> All other motor vehicles 76 dB(A) 80 dB(A) <br /> Be and the same is hereby amended to read as follows: <br /> Motor Vehicle Noise Levels. MAXIMUM PERMISSIBLE MOTOR VEHICLE NOISE <br /> LEVELS. Motor vehicle noise—Maximum permissible levels. <br /> It is unlawful for any person to operate any motor vehicle upon any public highway or <br /> any combination of such vehicles under any conditions of grade, load, acceleration, or <br /> deceleration in such a manner as to exceed the maximum permissible sound levels for <br /> the category of vehicle, as measured at a distance of fifty feet from the center of the <br /> lane of travel within the speed limits specified, under procedures established by the <br /> State Commission on equipment in WAC 204 56 set forth in chapter 173-62 WAC <br /> "Motor Vehicle Noise Performance Standards" including:, <br /> VEHICLE <br /> ehicle 35 45 MPH or <br /> Category Type Less Over 35 45 MPH <br /> Motor vehicles over 86 dB(A) 90 dB(A) <br /> 10,000 pounds GVWR of <br /> GCWR <br /> Motorcycles 80-78 dB(A) 84 82 dB(A) <br /> All other motor vehicles 76 72 dB(A) 80 78 dB(A) <br /> 68 <br />