Indiana State School Bus Committee
Item of Action
February 22, 2005

Noise Suppression Switch

Approved specification language and effective date

All school buses shall be equipped with a on/off type switch designed to simultaneously disable interior noise-producing accessories, if so equipped, such as: windshield and window defroster fans, driver and passenger heater fans, circulation fans, powered roof ventilators, air-conditioning systems, and radios or radio speakers. Identification shall be provided on or adjacent to the switch, in order to clearly state its purpose and distinguish it from other controls. The switch shall be accessible to the driver in a seated position.

Exception: On Type A buses with cutaway front section chassis and with bodies manufactured by a company other than the manufacturer of the chassis, the original equipment accessories, except radios (two-way, AM/FM, satellite radio, or other auditory type devices), provided by the chassis manufacturer are exempt from these requirements.

Effective date: All school buses with a body build date of January 1, 2006 or later.