ADR83/00 defines the limits on external noise generated by motor vehicles, motor cycles and mopeds in order to limit the contribution of motor traffic to community noise. The Department has prepared a list of the stationary "signature" noise data. Information is not currently available for all vehicle makes and models currently certified to ADR83/00. This data is being progressively updated.

The data is taken from tests conducted using the stationary noise test procedures in ADR83/00. The data is intended to be compared with the stationary noise emitted by a vehicle in-service. The noise level of vehicles in service should not exceed the quoted figure by more than an amount decided by each jurisdiction.

If the vehicle cannot reach the stationary engine test speed specified in ADR83/00, the engine speed used shall be 5 per cent below the maximum possible engine speed for that stationary test. The actual engine speed used during the ADR83/00 test is stated in the data.

This engine speed should also be used for in service checking. The location of the compliance plate is shown using a "grid" location system based on a series of pictorial representations.