Section 99 - Heavy Vehicle (Vehicle Standards) National Regulation (NSW) - Exhaust systems

99Exhaust systems

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99 Exhaust systems

(1) The outlet of the exhaust system fitted to a heavy motor vehicle must extend—

(a) behind the back seat; and

(b) at least 40mm beyond the outermost joint of the floorpan that is not continuously welded or permanently sealed; and

(c) to the edge of the vehicle, if—

(i) the vehicle’s body is permanently enclosed; and

(ii) the vehicle is not fitted with a vertical exhaust system; and

(d) no further than the edge of the vehicle at its widest point.

(2) The outlet mentioned in subsection (1) must discharge the main exhaust flow to the air—

(a) if the vehicle is fitted with a vertical exhaust system—

(i) at least 150mm above the cab of the vehicle; and

(ii) if the outlet discharges the main exhaust flow straight up—

(A) at an angle above the horizontal; and

(B) towards the rear, or to the right, of the vehicle; and

(iii) if the outlet does not discharge the main exhaust flow straight up—towards the rear of the vehicle and upwards at an angle within 0° to 45° of the longitudinal axis of the vehicle; or

(b) in any other case—

(i) less than 750mm above ground level; and

(ii) horizontally or downwards at an angle within 0° to 45° of the longitudinal axis of the vehicle; and

(iii) towards the rear, or to the right, of the vehicle.

(3) Subsections (1) and (2) do not apply to a heavy motor vehicle—

(a) that is a bus; or

(b) that is primarily designed for the carriage of goods with a GVM not exceeding 12t.

(4) An exposed section of a vertical exhaust system fitted to a heavy motor vehicle, other than a bus, must be positioned or shielded to prevent injury to any person.