49-937. MUFFLERS, PREVENTION OF NOISE. (1) Every motor vehicle shall at all times be equipped with a muffler in good working order and in constant operation to prevent excessive or unusual noise and annoying smoke, and no person shall use a muffler cut-out, bypass, or similar device upon a motor vehicle on a highway. When any motor vehicle was originally equipped with a noise suppressing system or when any motor vehicle is required by law or regulation of this state or the federal government to have a noise suppressing system, that system shall be maintained in good working order. No person shall disconnect any part of that system except temporarily in order to make repairs, replacements or adjustments, and no person shall modify or alter that system or its operation in any manner, except to conform to the manufacturer’s specifications. No person shall knowingly operate and no owner shall knowingly cause or permit to be operated any motor vehicle originally equipped or required by any law or regulation of the state or the federal government to be equipped with a noise suppressing system while any part of that system is disconnected or while that system or its operation is modified or altered in any manner, except to conform to the manufacturer’s specifications.
(2) The engine and power mechanism of every motor vehicle shall be so equipped and adjusted as to prevent the escape of excessive fumes or smoke.
(3) No person shall modify the exhaust system of a motor vehicle or a motorcycle in a manner which will amplify or increase the noise of the vehicle or motorcycle above that emitted by the muffler originally installed on the vehicle by the manufacturer.
(4) A showing that the sound made by a passenger motor vehicle or motorcycle exceeds the maximum allowable decibel level shall be prima facie evidence of a violation of subsection (1) of this section.
(5) No person shall sell, offer for sale, or install any noise suppressing system or device which will produce excessive or unusual noise.
History:
[49-937, added 1988, ch. 265, sec. 259, p. 706.]
Structure Idaho Code
Section 49-901 - DUTIES OF DEPARTMENT AND DIRECTOR OF IDAHO STATE POLICE.
Section 49-902 - SCOPE AND EFFECT.
Section 49-903 - WHEN LIGHTED LAMPS ARE REQUIRED.
Section 49-904 - VISIBILITY DISTANCE AND MOUNTED HEIGHT OF LAMPS.
Section 49-905 - HEAD LAMPS ON MOTOR VEHICLES.
Section 49-907 - MOTOR VEHICLES TO BE EQUIPPED WITH REFLECTORS.
Section 49-908 - STOP LAMPS AND TURN SIGNALS REQUIRED ON MOTOR VEHICLES.
Section 49-909 - ADDITIONAL EQUIPMENT REQUIRED ON CERTAIN VEHICLES.
Section 49-910 - COLOR OF CLEARANCE LAMPS, SIDE MARKER LAMPS, AND REFLECTORS.
Section 49-910A - COLOR OF LAMPS AND GLOBES LIMITED TO CERTAIN VEHICLE CLASSES.
Section 49-911 - VISIBILITY OF REFLECTORS, CLEARANCE LAMPS, AND MARKER LAMPS.
Section 49-912 - OBSTRUCTED LIGHTS NOT REQUIRED.
Section 49-913 - LAMP OR FLAG ON PROJECTING LOAD.
Section 49-914 - LAMPS ON PARKED VEHICLES.
Section 49-915 - SCHOOL BUSES — VISUAL SIGNAL.
Section 49-916 - LAMPS ON FARM TRACTORS, FARM EQUIPMENT AND IMPLEMENTS OF HUSBANDRY.
Section 49-917 - LAMPS ON OTHER VEHICLES AND EQUIPMENT.
Section 49-918 - SPOT LAMPS AND AUXILIARY LAMPS.
Section 49-919 - SIGNAL LAMPS AND SIGNAL DEVICES.
Section 49-920 - ADDITIONAL LIGHTING EQUIPMENT.
Section 49-921 - REAR MOUNTED ACCELERATION AND DECELERATION LIGHTING SYSTEM.
Section 49-922 - MULTIPLE-BEAM ROAD-LIGHTING EQUIPMENT.
Section 49-923 - USE OF MULTIPLE-BEAM ROAD-LIGHTING EQUIPMENT.
Section 49-924 - SINGLE-BEAM ROAD-LIGHTING EQUIPMENT.
Section 49-925 - LIGHTING EQUIPMENT ON MOTOR-DRIVEN CYCLES.
Section 49-926 - ALTERNATE ROAD-LIGHTING EQUIPMENT.
Section 49-927 - NUMBER OF DRIVING LAMPS REQUIRED OR PERMITTED.
Section 49-928 - SPECIAL RESTRICTIONS ON LAMPS.
Section 49-929 - LIGHTS ON SNOW REMOVAL EQUIPMENT.
Section 49-930 - SELLING OR USING LAMPS OR EQUIPMENT.
Section 49-934 - BRAKES ON MOTOR-DRIVEN CYCLES.
Section 49-937 - MUFFLERS, PREVENTION OF NOISE.
Section 49-943 - WINDSHIELDS TO BE UNOBSTRUCTED AND EQUIPPED WITH WIPERS.
Section 49-945 - SAFETY GLAZING MATERIAL IN MOTOR VEHICLES.
Section 49-948 - RESTRICTIONS AS TO TIRE EQUIPMENT.
Section 49-949 - REQUIREMENT AS TO FENDER OR COVERS OVER ALL WHEELS ON MOTOR VEHICLES.
Section 49-952 - CERTAIN VEHICLES TO CARRY FLARES OR OTHER WARNING DEVICES.
Section 49-953 - DISPLAY OF WARNING DEVICES WHEN VEHICLE DISABLED.
Section 49-956 - HORNS AND WARNING DEVICES.
Section 49-959 - AIR-CONDITIONING EQUIPMENT.
Section 49-962 - FOOTRESTS ON MOTORCYCLES AND MOTOR DRIVEN CYCLES.
Section 49-965 - MODIFICATION OF VEHICLE TO REDUCE ROAD CLEARANCE BEYOND CERTAIN LIMITS UNLAWFUL.
Section 49-966 - MOTOR VEHICLE BUMPER HEIGHT REQUIREMENTS.
Section 49-967 - AIR BAGS AND AIR BAG SYSTEMS — DISCLOSURE IF INOPERABLE.