Results of the review of proposals for UN Regulations R28, R51, R64, R138, R141, R142, and R165 regarding autonomous vehicle readiness. Key findings include: inconsistent Mass in Running Order definitions between R51 and R138 versus RE3; unclear special testing provisions in R64, R138, and R165; need for clarification on ADS optical and logical signal transition in R64; redundant full definitions from RE3 in multiple proposals should reference RE3 via footnote instead; inconsistent ADS activity terminology across R64, R141, and R165 should be standardized; incorrect Category Y references in R51 Table 2; and definition and spelling errors in R51, R138, R141, and R165.

Proposal to amend UN R141 under section 2 to add definitions of Automated Driving System, Dynamic Driving Task, Category X vehicles, Category Y vehicles, Logical signal, and Vehicle Master Control Switch, amend under section 5 to update performance requirements and warning signal specifications for vehicles equipped with an ADS and towed vehicles, amend Annex 1 to add a vehicle ADS status field, amend Annex 3 regarding test procedures for TPMS including deactivation of TPRS and CTIS, amend Annex 4 regarding test weight and refill functionality checks, amend Annexes 5A and 6 regarding towed vehicle communication interfaces, and insert new Annex 9 containing special testing provisions for vehicles equipped with an ADS.

Proposal to replace ECE/TRANS/WP.29/GRBP/2025/21

Proposal from the GRBP task force on Automated Vehicles Regulation Screening for amendments to enable the application of UN R141 to ADS vehicles.

Proposal for a reference document concerning a general approach for how to handle measurement uncertainties under UN Regulations within the purview of GRBP.

Proposal to introduce an alternative procedure for type approval of trailers (vehicles of categories O3 and O4) regarding their Tyre Pressure Monitoring System (TPMS), Tyre Pressure Refilling System (TPRS) and Central Tyre Inflation System (CTIS).

Proposal to clarify some prescriptions and correct some text inconsistencies

Text prepared by the Task Force on Tyre Pressure Monitoring System and Tyre Installation (TF TPMSTI) with the aim to implement the requirements for a Tyre Pressure Refill System (TPRS) and a Central Tyre Inflation System (CTIS)

Proposal to introduce an alternative procedure for type approval of trailers (vehicles of categories O3 and O4) regarding their Tyre Pressure Monitoring System (TPMS), Tyre Pressure Refilling System (TPRS) and Central Tyre Inflation System (CTIS) and to align UN R141 with the transitional provisions of European Union (EU) Regulation 2019/2144.

Proposal to introduce an alternative procedure for type approval of trailers (vehicles of categories O3 and O4) regarding their Tyre Pressure Monitoring System (TPMS), Tyre Pressure Refilling System (TPRS) and Central Tyre Inflation System (CTIS).

Proposal concerning requirements for Tyre Pressure Refill Systems (TPRS) and Central Tyre Inflation Systems (CTIS).

Proposal from the TPMSTI task force to update draft provisions for performance testing of Tyre Pressure Monitoring System/Tyre Pressure Refill System/Central Tyre Inflation System and for an alternative procedure for type approval of subject trailer(s).

TF TPMSTI implements the requirements for a Tyre Pressure Refill System (TPRS) and a Central Tyre Inflation System (CTIS)

Cleaned up version of document TPMSTI-18-02/Rev.3.

Draft proposal under the TMPSTI task force to apply the same tell-tale requirements for tyre pressure refill systems (TPRS) and central tyre inflation systems (CTIS) as already in place for tyre pressure monitoring systems (TPMS).

Revision of document WP.29/2021/10/Rev.1 per the outcomes of the 18th TPMSTI task force session.

Proposal from the TPMSTI task force to introduce in UN Regulation No. 141 an alternative procedure for type approval of trailers (vehicles of categories O3 and O4) regarding their Tyre Pressure Monitoring System (TPMS), Tyre Pressure Refilling System (TPRS) and Central Tyre Inflation System (CTIS).

Proposal from the TPMSTI task force to align UN Regulation No. 141 with the transitional provisions of European Union (EU) Regulation 2019/2144.

Annex 7: Performance testing of Tyre Pressure Monitoring / Tyre Pressure Refilling System / Central Tyre Inflation System
Annex 8: Alternative procedure for type approval of subject trailer(s)

Proposal to align UN Regulation No. 141 with the transitional provisions of European Union Regulation 2019/2144.

Proposal to introduce an alternative procedure for Type Approval of trailers (vehicles of category O3 and O4), regarding their Tyre Pressure Monitoring System (TPMS) / Tyre Pressure Refilling System (TPRS) / Central Tyre Inflation System (CTIS).

Updated draft including changes agreed during the 17th TPMSTI task force session.

Proposal to update the whole vehicle approval requirements to the latest series of amendments and to add the WLTP emissions cycle (UN R154). The update would also reflect the separation of UN R116 into three regulations respectively covering vehicle locking systems, alarm systems, and immobilizers.

Document revised to reflect CLEPA review.

Document as revised during the 15th TPMSTI task force session.

Correction to transitional provisions.

CLEPA draft as revised during the subgroup session. Marked up version with revisions also available.

Text as revised during a 5 May 2021 small group session.

Draft pursuant to discussions during the 2nd TAT subgroup session and updated as of 27 April.

Text prepared by the experts of TF TPMSTI in order to align with the provisions of European Union Regulation 2019/2144 and to introduce the TPMS requirements for all vehicle categories, including trailers. The proposal addresses the communication interface protocol of TPMS between towing and towed vehicles of categories N2, N3 and O3, O4, respectively (described in Annex 5 on the basis of the ISO bus requirements) in alignment with UN R13 and ISO updates. The proposal further corrects and clarifies provisions across TPMS, TPRS and CTIS.

Proposal from the TPMSTI task force to revise the communication interface protocol of TPMS between towing and towed vehicles of categories N2, N3 and O3, O4, respectively (described in Annex 5 on the basis of the ISO bus requirements) in alignment with UN R13 and ISO updates. The proposal further corrects and clarifies provisions across TPMS, TPRS and CTIS.

Proposal to align with the provisions of European Union Regulation 2019/2144 and to introduce the TPMS requirements for all vehicle categories.

Draft proposal concerning communications with a towed vehicle.

Scenarios regarding proposal for driver-display of “Trailer TPMS not Equipped” in addition to Trailer TPMS Malfunction indicator.

Proposal prepared by the experts on communication interfaces of the Task Force on Tyre Pressure Monitoring System and Tyre Installation (TF TPMSTI) to update the requirements on the communication interfaces between towing and towed vehicles.

Clean version of document TPMSTI-CI-04-02-Rev.1.

Working draft provisions pursuant to the 3rd Communications Interface task force session.

Task force text based upon Finland’s original proposals.

Text including section 5.6 on communications interface between towing and towed vehicles.

Updated version of TRL comments pursuant to the informal group discussion.

Based on GRBP/2020/20 with text to be confirmed in square brackets.

Text prepared by the experts of TF TPMSTI in order to align with the provisions of European Union Regulation 2019/2144 and to introduce the TPMS requirements for all vehicle categories

Text updated pursuant to the 5th TMPSTI session.

Withdrawal of proposals submitted to the 5th task force session concerning low pressure tell-tale illumination and for extension of the scope to M2, M3, N2, N3, O3 and O4 category vehicles.

Working draft as revised during the 4th TPMSTI task force session.

During the Task Force meeting on Tyre Pressure Monitoring Systems, which was held on February 17th, 2020, there was a discussion on the proposed definition “Twin wheel”. This document provides the references to the terms ‘Dual’, ‘Twin’, ‘Twinned’ and ‘Twinning’ in the different directives and regulations.

First-day session focused on UN R141.

Revised proposal pursuant to the first TMPSTI task force session to expand the scope of UN R142 to establish requirements for installation of tyre-pressure monitoring systems for category M₂, M₃, N₂, N₃, O₃ and O₄ vehicles.