634.07  MOTOR VEHICLES AND MOTORCYCLES ON PUBLIC RIGHTS OF WAY.
      (a)   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 herein.
TABLE 2
MOTOR VEHICLE AND MOTORCYCLE SOUND LIMITS
                  Sound Level in dBA                 Stationary Run-up 
      Vehicle Class      Speed Limit      Speed Limit      Stationary      Micro-         Noise
               35 MPH or      over 35 MPH      Engine         phone         Limit
               less (meas-      (measured       Speed         distance      (dBA)
               ured at 50      at 50 feet)               from
               feet)                           vehicle
   
Motor carrier             86         90         For vehicles      50 feet         88
vehicle of                              with gov-      from center
GVWR or GCWR                           ernors, test      line of
of 10,000 lbs.                              at maximum      vehicle
or more                              governor
                                 speed. For
                                 vehicle
                                 governors,
                                 test at 75
                                 percent of
                                 motor speed
                                 at maximum
                                 developed
                                 horsepower.
Any motorcycle          80         85         Test at 75      20 inches      101
                                 percent of      from rear
                                 motor speed      side of
                                 at maximum      vehicle
                                 developed
                                 horsepower
Any other motor         75         80                   20 inches      90
vehicle or any                                       from end
combination of                                    of tailpipe
vehicles towed by any motor vehicle
   (b)   Whoever violates this section is guilty of a minor misdemeanor, provided the violation is not committed willfully or knowingly, in which case it is a misdemeanor of the fourth degree. A separate offense shall be deemed committed each day during or on which a violation occurs or continues. Punishment shall be as provided in Section 698.02.
(Ord. 1980-144. Passed 9-16-81.)