UN Regulation No. 9: Three-Wheeled Cycle Noise

Uniform Provisions Concerning the Approval of Category L2, L4 and L5 Vehicles with Regard to Noise

Related groups: GRB and GRBP
UN R9 | Revision 3 (2013)
2 Dec 2013 2013-12-12 15:54:31 UTC 3 06 series of amendments 06 series of amendments | Corrigendum 1 06 series of amendments | Supplement 1 07 series of amendments Based upon the adopted proposal: WP.29/2013/2

Text adopted by the Working Party on Noise (GRB) at its fifty-sixth session as a consolidated version of the Regulation and aligning the test methods with those introduced into Regulation No. 41.

UN R9 | Revision 3 | Amendment 1 (2016)
5 Feb 2016 2016-02-09 07:08:12 UTC 3 1 07 series of amendments | Supplement 1 Based upon the adopted proposal: WP.29/2015/59

Proposal to update the reference to the latest version of the ISO 10844 and to introduce transitional provisions for the shift of the test track requirements from ISO 10844: 1994 to ISO 10844: 2014.

UN R9 | Revision 3 | Amendment 2 (2017)
23 Feb 2017 2017-02-24 14:35:38 UTC 3 2 07 series of amendments | Supplement 2 Based upon the adopted proposal: WP.29/2016/45

Proposal to clarify that conditioning of a silencing system is necessary only in cases where exhaust gases come into contact with silencer fibrous materials.

UN R9 | Revision 3 | Amendment 3 (2017)
5 Dec 2017 2017-12-13 16:02:12 UTC 3 3 07 series of amendments | Supplement 3 Based upon the adopted proposal: WP.29/2017/2

Proposal to clarify the text and align the provisions of UN R9 with other vehicle sound regulations, especially UN R41, pursuant to research conducted by the European Commission.

UN R9 | Revision 3 | Amendment 4 (2019)
7 Nov 2019 2019-12-30 10:53:38 UTC 3 4 08 series of amendments Based upon the adopted proposal: WP.29/2019/6

Proposal to introduce ASEP requirements for L4 and L5 category vehicles with PMR > 50 W/kg. The proposal aligns ASEP for high powered L4 and L5 vehicles, used for passenger transport, with UN Regulation No 41.04 due to comparable sound emissions levels of L4 and L5 vehicles with the ones of L3 vehicles and the possibility of applying similar measurement methods for sound emissions for those vehicle categories. This proposal is supported by the Commission study on enhanced sound requirements for mopeds, quads and replacement silencers of L-category vehicles which resulted in amendments to UN Regulation Nos 9, 63 and 92 (ref. document WP.29/2017/2).

Earlier texts may be available through the UN Official Document System.