Working Party on Noise | Session 59 | 28-30 Jan 2014
Geneva
Agenda Item 16. (a)
Regulation No. 28 (Audible warning devices)

34. The expert from OICA introduced GRB-59-06-Rev.1 to update the test conditions and provisions of UN Regulation No. 28: (i) to allow the test of the audible warning devices on the vehicle with its engine warmed-up and at idle and (ii) to reduce the prescribed sound level from 93 to 90 dB(A). He justified the second point because this reduced level was audible far enough to instantaneously warn pedestrians and other road users, including drivers, as it was typically 20 dB to 40 dB higher compared to typical traffic noise and could also contribute to lowering the noise pollution. The experts from Italy and ISO supported this proposal. The expert from France underlined that the whole text should be revised to update the test methods and that the limit proposed by OICA should be discussed. GRB agreed to resume discussion on this issue and requested the secretariat to distribute GRB-59-06-Rev.1 with an official symbol at its September 2014 session.

Documentation
GRB-59-06 Proposal for amendments to Regulation No. 28 (OICA)
GRB-59-06/Rev.1 Proposal for amendments to Regulation No. 28 (OICA)