Section 20-162(6) bars exhaust discharge except through a muffler that effectively prevents loud or explosive noises. Section 20-162(17) prohibits racing a vehicle engine while parked. Section 20-162(4) reaches vehicles out of repair. SC Code §56-5-5010 requires a working muffler statewide.
Section 20-162(6) makes unlawful the discharge of exhaust from any steam engine, stationary internal combustion engine, motorboat, or motor vehicle except through a muffler that effectively prevents loud or explosive noises. Section 20-162(17) prohibits racing the engine while the vehicle is not in motion, except for repair, adjustment, or testing. Section 20-162(4) reaches vehicles out of repair, loaded, or operated to create grating, grinding, or rattling. Section 20-162(8) limits horn use to danger warnings. The Division 2 cross-reference points to §18-69 (excessive vehicle noise) and §18-70 (motor vehicle zones of quiet). SC Code §56-5-5010 separately mandates working mufflers.
Chapter 20 vehicle-noise violations are misdemeanors prosecuted in Rock Hill Municipal Court, up to $500 and 30 days under SC Code §14-25-65. SC Code §56-5-5010 muffler violations are state traffic offenses.
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