634.07 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 or from the motor vehicle or motorcycle, exceeds the level set forth in Table 2.
 
TABLE 2. MOTOR VEHICLE AND MOTORCYCLE SOUND LIMITS
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

Micro- phone Distance from Vehicles



Noise Limit dBA
Motor carried vehicle of GVWR or GCWR of 10,000 lbs.or more
86
90
For vehicles w/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 at maximum developed horse-power
20 inches from rear side of vehicle
101
Any other vehicle or any combination of vehicles towed by any vehicle
75
80
Test at 3,000 RPM
20 inches from end of tail- pipe
90
(Ord. 36-94. Passed 3-14-94.)