WP.29 Rulemaking Project
Particle Measurement Programme

The Particle Measurement Programme (PMP) was established to improve the sensitivity of the Particulate Matter (PM) mass measurement system for heavy and light duty vehicle emissions. PMP developed a particle number (PN) counting method for ultrafine solid particles and enhancements to the PM measurement procedure that were incorporated into UN R83 and R49.
Since 2013, PMP has focused on PN as a function of particle size (mainly on the difference between the number of particles measured with the existing PMP methodology (d50=23 nm) and with systems with lower d50s, investigating the possibility to modify the existing d50 methodology from 23 to about 10 nm.

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10 Feb 2017	10 Feb 2017 \| Are diesels slipping back?		The Particle Measurement Programme (PMP) was established to improve the sensitivity of the Particulate Matter (PM) mass measurement system for heavy and light duty vehicle emissions. PMP developed a particle number (PN) counting method for ultrafine solid particles and enhancements to the PM measurement procedure that were incorporated into UN R83 and R49. Since 2013, PMP has focused on PN as a function of particle size (mainly on the difference between the number of particles measured with the existing PMP methodology (d50=23 nm) and with systems with lower d50s, investigating the possibility to modify the existing d50 methodology from 23 to about 10 nm. PMP Particle Measurement Programme WP.29 Regulatory Project Particle Measurement Programme and Uniform provisions concerning the measures to be taken against the emission of gaseous and particulate pollutants from compression-ignition engines and positive ignition engines for use in vehicles Diesel/CNG/LNG Engine Emissions Diesel and CNG/LNG Engine Emissions UN Regulation No. 49 UN R49
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Development of the Initiative

Pending Changes to Particle Measurement Programme

Latest Documents

20 Feb 2020

Notes from the 52nd PMP informal group session | PMP-52-02

10 Feb 2020

Follow-up research into the PN limit value and the measurement method for checking particulate filters with a particle number counter | PTI-17-05

10 Feb 2020

PTI: Particle Number Counter- Metrological controls and performance tests | PTI-17-04

See all 219 related documents

Latest Meeting Discussions
Working Party on Pollution and Energy \| Session 81 \| 9-12 Jun 2020
Working Party on Pollution and Energy \| Session 80 \| 14-17 Jan 2020
Informal Group for the Particle Measurement Programme \| Session 52 \| 13 Jan 2020
	See more related meetings

Latest Meeting Discussions
Working Party on Pollution and Energy \| Session 81 \| 9-12 Jun 2020
Working Party on Pollution and Energy \| Session 80 \| 14-17 Jan 2020
Informal Group for the Particle Measurement Programme \| Session 52 \| 13 Jan 2020
	See more related meetings

Regulation:	UN Regulation No. 117 \| Tire Rolling Sound Emissions, Adhesion on Wet Surfaces, and Rolling Resistance
Document:	Revision 4 \| Amendment 2
Corresponds to:	02 series of amendments \| Supplement 10 (Entered into force on 11 Jan 2020)
Based on:	Document WP.29/2019/54 Proposal to correct a type in Annex 7- Appendix 2, Part 2, Paragraph 5 where the snow group index should read “1.00”, not “100” as appeared erroneously in the adopted text correct the text where the word “tyres” was inadvertently omitted from Paragraph 2.1. align the provisions of UN R117 regarding approval numbers and markings with the provisions of Schedule 4 to the revised 1958 Agreement.

Regulation:	UN Regulation No. 129 \| Enhanced Child Restraint Systems
Document:	Revision 4 \| Amendment 2
Corresponds to:	03 series of amendments \| Supplement 2 (Entered into force on 11 Jan 2020)
Based on:	Document WP.29/2019/40 Proposal to introduce new and modified labeling and to clarify packaging information to distinguish between forward-facing-only, rear-facing-only, and convertible CRS in order to reduce the risk of users misusing these enhanced CRS clarify that assessment of the DE plane only applies to rearward-facing Child Restraint Systems (CRS) in UN Regulation No. 44 and therefore does not apply to forward-facing child restraints that maintain structure of the child restraint behind the head of the dummy specify the dimensions of the approval number update i-Size universal ISOFIX, Specific Vehicle ISOFIX, i-Size Booster seat and Specific Vehicle Booster seat numbering (omitted in WP29-2018-045) rearrange the dimensions mark for arrangements of the approval mark where used in combination with the module mark change the 145 cm stature of the Specific Vehicle Booster seat to 150 cm stature as this is the correct upper limit, and clarify that Conformity of Production assessments shall be conducted under the same requirements as those of the original approval or, if applicable, the extension of the approval.

Regulation:	UN Regulation No. 129 \| Enhanced Child Restraint Systems
Document:	Revision 3 \| Amendment 4
Corresponds to:	02 series of amendments \| Supplement 5 (Entered into force on 11 Jan 2020)
Based on:	Document WP.29/2019/39 Proposal to introduce new and modified labeling and to clarify packaging information to distinguish between forward-facing-only, rear-facing-only, and convertible CRS in order to reduce the risk of users misusing these enhanced CRS clarify that assessment of the DE plane only applies to rearward-facing Child Restraint Systems (CRS) in UN Regulation No. 44 and therefore does not apply to forward-facing child restraints that maintain structure of the child restraint behind the head of the dummy specify the dimensions of the approval number correct the term “Regulation No. 129-02” to “UN Regulation No. 129/02” change the 145 cm stature of the Specific Vehicle Booster seat to the 150 cm stature as this is the upper limit, and modify the approval markings for consistency between technical services and approval authorities and between the labels of products approved under the 02 and 03 series.

Regulation:	UN Regulation No. 129 \| Enhanced Child Restraint Systems
Document:	Revision 1 \| Amendment 7
Corresponds to:	01 series of amendments \| Supplement 6 (Entered into force on 11 Jan 2020)
Based on:	Document WP.29/2019/38 Proposal to introduce new and modified labeling and to clarify packaging information to distinguish between forward-facing-only, rear-facing-only, and convertible CRS in order to reduce the risk of users misusing these enhanced CRS, and clarify that assessment of the DE plane only applies to rearward-facing Child Restraint Systems (CRS) in UN Regulation No. 44 and therefore does not apply to forward-facing child restraints that maintain structure of the child restraint behind the head of the dummy.

WP.29 Rulemaking Project Particle Measurement Programme

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WP.29 Rulemaking Project
Particle Measurement Programme