§ 93.06 MOTOR VEHICLE NOISE LEVELS.
   (A)   No person shall sell or offer for sale or use or operate a motor vehicle or motorcycle at any time or under any condition of grade, lead, acceleration or deceleration in a manner as to exceed the following noise limits for its category, based on a distance of not less than 25 feet from the centerline of travel or stationary location under test procedures established by § 93.10 of this chapter.
 
Motor Vehicle
Noise Limit
Any motor vehicle with a manufacturer’s GVW rating of 8,000 pounds or more and any combination of vehicles towed by the vehicles
86 dB(A)
Any motorcycle manufactured prior to January 1, 1978
82 dB(A)
Any motorcycle manufactured after January 1, 1978
78 dB(A)
Any other motor vehicle, including passenger cars and any combination of motor vehicles towed by the motor vehicles
76 dB(A)
 
   (B)   This section applies to the total noise from a vehicle or combination of vehicles and does not limit or preclude the enforcement of any other ordinance relating to motor vehicle noise control. For the purpose of this section, a motor truck, truck tractor or bus that is not equipped with an identification plate or marking bearing the manufacturer’s name and manufacturer’s gross vehicle weight rating shall be considered as having manufacturer’s gross vehicle weight rating of 8,000 pounds or more if the unladen weight is more than 7,000 pounds. Any vehicle which is found not to be in conformity with this chapter and which is manufactured prior to January 1, 1978, may be exempted from the noise levels specified herein, provided a good and sufficient showing can be made that it is mechanically impossible without major construction to modify the equipment so as to be in compliance or that to comply would cause irreparable harm or injury to the engine of the vehicle.
(1999 Code, § 53.06) Penalty, see § 93.99