§ 36-8. Motor vehicle noise.  

Latest version.
  • (a)

    No person shall operate nor shall the owner permit the operation of any motor vehicle or combination of motor vehicles at any time or place when such operation exceeds the sound pressure levels for the corresponding category of motor vehicle as specified in Table B. Except as provided in this subsection (a), the standards in Table B apply to all noise emitted from motor vehicles including any and all equipment thereon, under any condition of acceleration, deceleration, idle, grade or load and regardless of whether in motion. In lieu of Table B, the provisions of section 36-6 Table A apply when a motor vehicle is parked and vehicle auxiliary equipment is in use.


    Maximum Allowable Noise Sound Pressure Levels for Motor Vehicles

    Type of Vehicle Maximum Allowable Sound Pressure Level Measurement Distance from Motor Vehicle
    Motor vehicles weighing less than 10,000 pounds, manufacturers gross vehicle weight 82 dB(A) 25 feet
    Motor vehicles weighing 10,000 pounds or more, manufacturers gross vehicle weight 90 dB(A) 50 feet




    It shall be unlawful for any person to operate, or for the owner of any motor vehicle to permit the operation of any motor vehicle or combination of motor vehicles at any time, that is not equipped with any exhaust muffler approved by this chapter.


    It is unlawful for any person or for any owner to allow any person to modify, tamper with, alter, or change any motor vehicle in any manner that causes the sound emitted from the motor vehicle to exceed the corresponding sound pressure level in Table B.


    No person shall, nor shall the owner allow any person to, operate a motorcycle manufactured after December 31, 1982 that is not equipped with an exhaust muffler bearing the Federal EPA required labeling applicable to the motorcycle's model year, as set out in Code of Federal Regulations Title 40, Volume 24, Part 205, Subpart D and Subpart E; or a muffler or muffler system in compliance with Table B.

(Code 1950, § 717.8; Ord. No. 237-99, § 6, 3-29-99; Ord. No. 249-07, § 1, 6-4-07)

State law reference

Noise restrictions on the sale of new vehicles, C.R.S. 1973, 25-12-106.

Cross reference

Traffic regulation, Ch. 54.