UN Regulation No. 138
Quiet Road Transport Vehicles

Uniform provisions concerning the approval of Quiet Road Transport Vehicles with regard to their reduced audibility (QRTV)

This Regulation requires an “audible vehicle alerting system” (AVAS) to reduce the risk of collisions with vulnerable road users unable to aurally detect the presence of electrified vehicles.

Download the Regulation

Revisions and Amendments

Series of Amendments and Supplements

Application of the Regulation

Contracting Parties applying UN R138

Related News and Information


5 Dec 2017	5 Dec 2017 \| Hearing hybrid and electric vehicles while quieting noise pollution	Formal title to be determined. QRTV-GTR Quiet Road Transport Vehicles WP.29 Regulatory Project Quiet Road Transport Vehicles and Uniform provisions concerning the approval of Quiet Road Transport Vehicles with regard to their reduced audibility (QRTV) This Regulation requires an "audible vehicle alerting system" (AVAS) to reduce the risk of collisions with vulnerable road users unable to aurally detect the presence of electrified vehicles. Quiet Road Transport Vehicles Quiet Road Transport Vehicles UN Regulation No. 138 UN R138
2 Mar 2017	2 Mar 2017 \| What Will Electric Cars Sound Like?	Formal title to be determined. QRTV-GTR Quiet Road Transport Vehicles WP.29 Regulatory Project Quiet Road Transport Vehicles and Uniform provisions concerning the approval of Quiet Road Transport Vehicles with regard to their reduced audibility (QRTV) This Regulation requires an "audible vehicle alerting system" (AVAS) to reduce the risk of collisions with vulnerable road users unable to aurally detect the presence of electrified vehicles. Quiet Road Transport Vehicles Quiet Road Transport Vehicles UN Regulation No. 138 UN R138
13 Oct 2016	13 Oct 2016 \| Entry into force of UN Regulation No. 138 on Quiet Road Transport Vehicles	Uniform provisions concerning the approval of Quiet Road Transport Vehicles with regard to their reduced audibility (QRTV) This Regulation requires an "audible vehicle alerting system" (AVAS) to reduce the risk of collisions with vulnerable road users unable to aurally detect the presence of electrified vehicles. Quiet Road Transport Vehicles Quiet Road Transport Vehicles UN Regulation No. 138 UN R138
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Development of the Regulation

Pending Changes to UN R138

Latest Documents

12 Nov 2019

IWVTA informal group: Report to WP.29 | WP.29-179-08

5 Sep 2019

UN R138 and reversing warning requirements | TFRWS-08-02/Rev.1

25 Jul 2019

UN R138: Draft amendment to the 01 series of amendments | ASEP II-12-14

See all 102 related documents

Latest Meeting Discussions
Working Party on Noise and Tyres \| Session 71 \| 28-31 Jan 2020
Working Party on Noise and Tyres \| Session 70 \| 11-13 Sep 2019
World Forum for the Harmonization of Vehicle Regulations \| Session 178 \| 24-28 Jun 2019
	See more related meetings

Latest Meeting Discussions
Working Party on Noise and Tyres \| Session 71 \| 28-31 Jan 2020
Working Party on Noise and Tyres \| Session 70 \| 11-13 Sep 2019
World Forum for the Harmonization of Vehicle Regulations \| Session 178 \| 24-28 Jun 2019
	See more related meetings

Regulation:	UN Regulation No. 19 \| Front Fog Lamps
Document:	Revision 7 \| Amendment 6 \| Corrigendum 1
Corresponds to:	05 series of amendments (Entered into force on 15 Oct 2019)
Based on:	Document WP.29/2018/95/Rev.1 Revised proposal from GRE (for the March 2019 WP.29 session) to introduce transitional provisions for the phasing out of UN R19 in conjunction with the introduction of the new UN Regulation on Road Illumination Devices (RID).

Regulation:	UN Regulation No. 10 \| Electromagnetic Compatibility
Document:	Revision 6
Corresponds to:	06 series of amendments (Entered into force on 15 Oct 2019)
Based on:	Document WP.29/2019/20 Proposal to align UN R10 with the vehicle narrow-band limit and the latest set-ups (artificial networks, harness location, Z-folding, …) for vehicles in charging mode under the International Special Committee on Radio Interference (CISPR) 12 Standard. The proposal also introduces additional details for vehicles in charging mode operating conditions (alternating or direct current charging).

Regulation:	UN Regulation No. 0 \| International Whole Vehicle Type Approval System (IWVTA)
Document:	Amendment 1
Corresponds to:	01 series of amendments (Entered into force on 15 Oct 2019)
Based on:	Document WP.29/2018/82 Proposal to update the list of UN Regulations subject to UN R0 (Annex 4), including addition of UN R14 (safety belt anchorages) and UN R34 (rear impact and fire risk).

Regulation:	UN Regulation No. 50 \| Position and Indicator Lamps for Motorcycles
Document:	Revision 3 \| Amendment 5
Corresponds to:	01 series of amendments (Entered into force on 15 Oct 2019)
Based on:	Document WP.29/2018/103/Rev.1 Revised proposal from GRE (for the March 2019 WP.29 session) to introduce transitional provisions for the phasing out of UN R50 in conjunction with the introduction of the new UN Regulation on Light-Signaling Devices (LSD).

UN Regulation No. 138 Quiet Road Transport Vehicles