Proposal to update and clarify the regulation. The proposal refines definitions, removes the “AWD” abbeviation for “audible warning device” to avoid confusion with its more common use for “all wheel drive”, modifies some administrative communications, and proposes three-direction acoustic measurements. The proposal also aims to structure the regulation to enable its application to additional sound warning devices not presently regulated at the international level, excluding acoustic vehicle alerting systems (AVAS) which will be subject to a separate regulation on minimum vehicle sound levels.
This proposal (WP.29/2017/3) was adopted by the World Forum. Thirty-five Contracting Parties out of the 45 applying UN R28 were present for the vote by AC.1. Thirty-five voted in favor with zero against and zero abstaining.