| Particle Measurement Programme: Minutes of the 56th (May 2026) session |
| Reference Number: PMP-56.3-10 |
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The 56th PMP session convened online on 7 May 2026 with approximately 70 participants. Meeting minutes from 13 March 2026 were accepted. PMP agreed on a joint neutral template for all task forces. TF3a discussed cooling air adjustment, temperature criteria, and vehicle emission factors, with proposals requested by end of May 2026. TF3b will discuss family building and speed-limited vehicles. TF3c presented brake replacement parts activities. TF4 prepared work package B on electromechanical brakes and requested feedback by end of May 2026. TF5 reported progress on GTR on HD brake particle emissions with test campaigns planned. The next meeting is expected end of June or beginning of July 2026. |
| Meeting Sessions: PMP-56.3 (7 May) |
| Document date: 11 May 26 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| PMP Task Force 3c status report |
| Reference Number: PMP-56.3-06 |
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At the 94th session of GRPE, CLEPA proposed a draft UN Regulation for approval of replacement brake parts. A dual pathway approach was proposed with two options depending on data availability: fully available data or minimal set of data with worst-case assumptions. PMP Task Force 3c was established to prepare a UN Regulation for approving replacement brake parts regarding particle emissions. The TF3c will define minimum information required under the simplified approach, assess variability within a family, and identify worst-case assumptions. CLEPA presented two approval concepts and requested support for Option A only. The next meeting is scheduled for 18 May 2026. |
| Submitted by: CLEPA |
| Meeting Sessions: PMP-56.3 (7 May) |
| Document date: 07 May 26 |
| Relevant to: WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle Measurement Programme: Agenda for the 56th (May 2026) session |
| Reference Number: PMP-56.3-01 |
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The PMP webex meeting scheduled for 7 May 2026, 12:00-14:30 CET will review meeting minutes from 13.03.2026, provide an overview of amendments to Brakes GTR 24 and UN R179 covering layout and testing topics, vehicle limited speed, brake replacement parts, and electromechanical brakes, discuss GTR HD brakes, and address any other business. |
| Meeting Sessions: PMP-56.3 (7 May) |
| Document date: 07 May 26 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Electromechanical Braking Systems, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle Measurement Programme: Minutes of the 13 March 2026 session |
| Reference Number: PMP-56.2-02 |
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The PMP session discussed revisions to the group’s terms of reference to address overlapping technical issues with GTR 24, UN R179, and replacement parts regulations. Three task forces were proposed: TF3a on layout and testing, TF3b on speed-limited vehicles, and TF4 on electromechanical brakes. Topics included non-original brake parts regulations, UN R179 amendments for new vehicle categories, and GTR heavy-duty brake particle emissions standards. The next meeting was scheduled for end of April 2026. |
| Meeting Sessions: PMP-56.2 (13 Mar) |
| Document date: 27 Mar 26 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Electromechanical Braking Systems, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle Measurement Programme: Minutes of the 56th (February 2026) session |
| Reference Number: PMP-56.1-13 |
| Meeting Sessions: PMP-56.1 (26 Feb) |
| Document date: 27 Mar 26 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Electromechanical Braking Systems, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Replacement brake emissions: Proposal to amend GRPE/2026/26 |
| Reference Number: GRPE-94-36/Rev.1 |
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This document is also available with tracked changes. |
| Submitted by: CLEPA |
| Meeting Sessions: 94th GRPE session (17-19 Mar) |
| Document date: 18 Mar 26 |
| Document status: Formal GR review |
| Relevant to: WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| PMP informal group status report to GRPE |
| Reference Number: GRPE-94-26 |
| Meeting Sessions: 94th GRPE session (17-19 Mar) |
| Document date: 18 Mar 26 |
| Relevant to: WP.29 Discussion Topic | Particle Measurement Programme, GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Information exchange on brake emissions of non-original parts |
| Reference Number: DETA-55-04 |
| Submitted by: CLEPA |
| Meeting Sessions: 55th DETA session (5 Mar) |
| Document date: 04 Mar 26 |
| Relevant to: WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions and WP.29 Discussion Topic | Database for the Exchange of Type Approval Documentation |
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| Replacement brake particle emissions: Comments on proposal for a new UN Regulation |
| Reference Number: PMP-56.1-04 |
| Submitted by: JASIC |
| Meeting Sessions: PMP-56.1 (26 Feb) |
| Document date: 26 Feb 26 |
| Relevant to: WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| HDV Brake Enclosure |
| Reference Number: PMP-56.1-06 |
| Submitted by: JARI and JASIC |
| Meeting Sessions: PMP-56.1 (26 Feb) |
| Document date: 26 Feb 26 |
| Relevant to: UN Regulation No. 90 | Replacement Brake Linings, Discs, and Drums, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Brake emissions from non-original parts |
| Reference Number: PMP-56.1-02 |
| Submitted by: CLEPA |
| Meeting Sessions: PMP-56.1 (26 Feb) |
| Document date: 24 Feb 26 |
| Relevant to: WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle emissions of replacement brake components: Proposal for a new UN Regulation |
| Reference Number: PMP-56.1-03 |
| Submitted by: CLEPA |
| Meeting Sessions: PMP-56.1 (26 Feb) |
| Document date: 24 Feb 26 |
| Relevant to: WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Proposal for a new UN Regulation on Uniform Provisions concerning the Approval of Non-Original and Identical Brake Parts with Regards to the Particulate Emissions |
| Reference Number: GRPE/2026/26 |
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Proposal to establish approval requirements for the particle emissions of replacement brake pads (based on the laboratory method established by GTR 24). |
| Submitted by: CLEPA |
| Meeting Sessions: 94th GRPE session (17-19 Mar) |
| Document date: 06 Jan 26 |
| Document status: Formal GR review |
| Relevant to: WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| UN R68: Proposal for a Supplement 2 |
| Reference Number: GRPE/2026/6 |
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Proposal to enable the approval of vehicles equipped with an Automated Driving System under this Regulation. |
| Meeting Sessions: 94th GRPE session (17-19 Mar) |
| Document date: 02 Jan 26 |
| Document status: Formal GR review |
| Relevant to: UN Regulation No. 68 | Measurement of Maximum Vehicle Speed and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle Measurement Programme: Minutes of the 56th (October 2025) session |
| Reference Number: PMP-56-08 |
| Meeting Sessions: 56th PMP session (14 Oct 2025) |
| Document date: 27 Oct 25 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| GTR 24: Inter-laboratory Study #3: Summary |
| Reference Number: PMP-56-06 |
| Submitted by: EC |
| Meeting Sessions: 56th PMP session (14 Oct 2025) |
| Document date: 15 Oct 25 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Study on non-exhaust emissions in road transport |
| Reference Number: PMP-56-05 |
| Submitted by: EMISIA |
| Meeting Sessions: 56th PMP session (14 Oct 2025) |
| Document date: 15 Oct 25 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Tyre abrasion test method development, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle Measurement Programme: Agenda for the 56th (October 2025) session |
| Reference Number: PMP-56-01 |
| Meeting Sessions: 56th PMP session (14 Oct 2025) |
| Document date: 13 Oct 25 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle Measurement Programme: Minutes of the 55th (September 2025) session |
| Reference Number: PMP-55.2-09 |
| Meeting Sessions: PMP-55.2 (26 Sep 2025) |
| Document date: 30 Sep 25 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| Particle Measurement Programme: Minutes of the 55th (July 2025) session |
| Reference Number: PMP-55.1-13 |
| Meeting Sessions: PMP-55.1 (10 Jul 2025) |
| Document date: 15 Jul 25 |
| Relevant to: GTR No. 24 | Laboratory Measurement of Brake Emissions for Light-Duty Vehicles, WP.29 Regulatory Project | Heavy-duty Vehicle Brake Particle Emissions Measurement, UN Regulation No. 179 | Approval of vehicles with regard to the particle emissions of their braking system, and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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| UN R34: Revision to enable application to ADS vehicles |
| Reference Number: GRSG-AVRS-13-03 |
| Submitted by: OICA |
| Meeting Sessions: 13th GRSG-AVRS session (16 Jun 2025) |
| Document date: 03 Jul 25 |
| Relevant to: UN Regulation No. 34 | Prevention of Fire Risks and WP.29 Regulatory Project | Approval of Non-Original and Identical Brake Parts with regard to the Particulate Emissions |
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