4. Amendment to the Australian Vehicle S4. Amendment to the Australian Vehicle Standards Rules

4. Amendment to the Australian Vehicle Standards Rules

After rule 153 of the Australian Vehicle Standards Rules insert –

“153A Limits on engine brake noise

(1) In this rule –

approved engine brake noise measuring and recording device means a device that measures and records the engine brake noise emitted by a vehicle and that is of a type that has been approved by the [relevant jurisdictional authority] as suitable for the enforcement of engine brake noise limits;

modulated RMS means the figure that results from applying the method set out in National In‑Service Test Procedures for Engine Brake Noise From Heavy Vehicles dated August 2007 published by the National Transport Commission, as amended from time to time, to a heavy vehicle’s engine brake noise as measured and recorded by an approved engine brake noise measuring and recording device in accordance with the procedures set out in that document.

(2) An engine brake device fitted to a motor vehicle must not emit noise that has a modulated RMS of more than 1.7. (3) For the purposes of sub‑rule (2), an engine brake device includes any exhaust outlets of the device, and anything attached to such outlets, including mufflers.”.