a. Trucks shall not be operated on any street within the City of Phoenix at any time in such a manner as to disturb the public peace and welfare by loud or unusual noise, or noise of such character, intensity or duration as to be in disturbance of the public peace and welfare including, but not limited to, blowing horns, exhaust noises and the use of mechanical loudspeakers or amplifiers.

b. Any person who violates the provision of section (a) is subject to a civil sanction for which the court shall impose a sanction in the amount of two hundred fifty dollars. (Ord. No. G-2978, § 2)