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515.07 MOTOR VEHICLES AND MOTORCYCLES ON PUBLIC RIGHTS OF WAY.
   No person shall operate, cause to be operated or permit a public or private motor vehicle or motorcycle on a public right of way at any time in such a manner that the sound level emitted by the motor vehicle or motorcycle exceeds the level set forth in Table 2.
TABLE 2. MOTOR VEHICLE AND MOTORCYCLE SOUND LIMIT
 
Sound level in dBA
Stationary Run-up
 
 
 
Vehicle Class
Speed limit
35 MPH or
Less
(measured
at 50 ft.)
Speed limit
over 35 MPH
(measured
at 50 ft.)
 
Stationary
Engine
Speed
Microphone
Distance
From
Vehicle
 
Noise
Limit
dBA
Motor carried vehicle of GVWR or GCWR of 10,000 lbs. or more
86
90
For vehicles with governors, test at maximum governor speed. For vehicles without governors, test at 75% of motor speed at maximum developed horsepower.
50 feet from center line of vehicle
88
Any motorcycle
80
85
Test at 75% of motor speed of maximum developed horsepower.
20 inches from rear side of vehicle.
101
Any other motor vehicle or any combination of vehicles towed by any motor vehicle
75
80
Test at 3,000 RMP.
20 inches from end of tailpipe.
90
 
(Ord. 66-76. Passed 12-6-76.)