UN R61 Supplement 5 (00 series) · UNECE Regulation No. 61 (ECE R61) — Uniform provisions concerning the approval of commercial vehicles with regard to their external projections forward of the cab's rear panel.

UN R61 — Supplement 5 to the 00 series of amendments

Supplement 4 → 5

Adopted at the WP.29 199th sessionEntry into force not yet known

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What changed: For vehicles of category Y without a cab, paragraph 2.5. replaces the “cab rear panel” with a theoretical vertical transversal plane. This plane is 350 mm behind the rearmost point of the tyre of the foremost front axle.
New paragraphs 0. to 0.1.3. add an Introduction on vehicles of categories X and Y and on vehicles with an ADS.
In a vehicle without “driver/driver cab/manual driving controls”, provisions related to them must not be taken into account, unless this amendment already covers them.
Why: The Regulation was originally drafted for vehicles with a driver, a driver cab and manual driving controls.
The amendment intends to extend the application of the Regulation to vehicles without a driver and/or driver cab and without manual driving controls.
The definition in paragraph 2.5. is amended to account for vehicles without a driver’s cab.

Q1What changed8 changes

New Introduction: the purpose of Supplement 5 (paras 0. and 0.1.)

New paragraph 0. adds an Introduction to the Regulation. Paragraph 0.1. says that Supplement 5 is introduced to take into account vehicles of categories X and Y. It is also introduced to take into account vehicles with an Automated Driving System (ADS) and a manual mode operating at speeds above 6 km/h. Before this supplement, the Regulation had no paragraph 0.

Introduction

Supplement 5 to the original version of the UN Regulation is introduced to take into account vehicles of categories X and Y, as well as vehicles with a manual mode operating at speeds above 6 km/h which are equipped with an Automated Driving System (ADS).

Vehicles without a driver, driver cab or manual driving controls, and vehicles with an ADS (paras 0.1.1. and 0.1.3.)

Paragraph 0.1.1. says that the Regulation was originally drafted for vehicles with a driver, a driver cab and manual driving controls. The amendment intends to keep the spirit of the Regulation. The amendment also intends to extend the application of the Regulation to vehicles without a driver and/or driver cab and without manual driving controls. In a vehicle without “driver/driver cab/manual driving controls”, provisions related to them must not be taken into account, unless this amendment already covers them. Paragraph 0.1.3. says that for vehicles equipped with an ADS in any driving mode, no special provisions or exemptions apply.

The UN Regulation was originally drafted for vehicles with driver, driver cab and manual driving controls. It is the intention of this new amendment to keep the spirit of the UN Regulation and to extend its application to vehicles without driver and/or driver cab and without manual driving controls in the vehicle. In the absence of driver/driver cab/manual driving controls in the vehicle, provisions related to them shall not be taken into account if not already covered by this amendment.

In case of vehicles equipped with an ADS in any driving mode, no special provisions or exemptions apply.

Cab rear panel for vehicles of category Y without a cab (paras 2.5. and 0.1.2.)

For vehicles of category Y without a cab, paragraph 2.5. now replaces the “cab rear panel” with a theoretical vertical transversal plane. This plane is 350 mm behind the rearmost point of the tyre of the foremost front axle. Before this supplement, paragraph 2.5. did not refer to vehicles of category Y. New paragraph 0.1.2. says that the definition in paragraph 2.5. is amended to account for vehicles without a driver’s cab. In this case, a theoretical plane defines the area in front of and to the sides of the vehicle where external projections are present.

"Cab rear panel" means the rearmost part of the external surface of the driver and passenger compartment. Where it is not possible to determine the position of the rear cab panel, for the purposes of this UN Regulation it would be deemed to be the vertical transversal plane situated 50 cm to the rear of the ‘R ’ point of the driver seat, with the seat, if adjustable, located at its rearmost driving position (see annex Annex 3). However, the manufacturer may, with the agreement of the technical services, request an alternative distance if 50 cm can be shown as being inappropriate for a particular vehicle; for vehicles of category Y without a cab, the "cab rear panel" shall be replaced by a theoretical vertical transversal plane located 350 mm behind the rearmost point of the tyre of the foremost front axle.

The definition in paragraph 2.5. has been amended to account for vehicles without a driver’s cab. In this case, a theoretical vertical transversal plane is used to define the area in front of, and to the sides of the vehicle where external projections are present.

References to R.E.3 in footnotes 1 and 3 (paras 1.1. and 4.4.1.)

Footnote 1 to paragraph 1.1. now gives document ECE/TRANS/WP.29/78/Rev.8 for the Consolidated Resolution on the Construction of Vehicles (R.E.3.). Before, it gave document ECE/TRANS/WP.29/78/Rev.7. Footnote 3 to paragraph 4.4.1. no longer lists the distinguishing numbers of the Contracting Parties. It now says that Annex 3 to R.E.3, document ECE/TRANS/WP.29/78/Rev.8, reproduces these numbers.

As defined in the Consolidated Resolution on the Construction of Vehicles (R.E.3.), document ECE/TRANS/WP.29/78/Rev.7ECE/TRANS/WP.29/78/Rev.8 - https://unece.org/transport/vehicle-regulations/wp29/resolutions

1 for Germany, 2 for France, 3 for Italy, 4 for the Netherlands, 5 for Sweden, 6 for Belgium, 7 for Hungary, 8 for the Czech Republic, 9 for Spain, 10 for Serbia and Montenegro, 11 for the United Kingdom, 12 for Austria, 13 for Luxembourg, 14 for Switzerland, 15 (vacant), 16 for Norway, 17 for Finland, 18 for Denmark, 19 for Romania, 20 for Poland, 21 for Portugal, 22 for the Russian Federation, 23 for Greece, 24 for Ireland, 25 for Croatia, 26 for Slovenia, 27 for Slovakia, 28 for Belarus, 29 for Estonia, 30 (vacant), 31 for Bosnia and Herzegovina, 32 for Latvia, 33 (vacant), 34 for Bulgaria, 35 (vacant), 36 for Lithuania, 37 for Turkey, 38 (vacant), 39 for Azerbaijan, 40 for The former Yugoslav Republic of Macedonia, 41 (vacant), 42 for the European Community (approvals are granted by its Member States using their respective ECE symbol), 43 for Japan, 44 (vacant), 45 for Australia, 46 for Ukraine, 47 for South Africa, 48 for New Zealand, 49 for Cyprus, 50 for Malta, 51 for the Republic of Korea, 52 for Malaysia and 53 for Thailand. Subsequent numbers shall be assigned to other countries in the chronological order in which they ratify the Agreement concerning the Adoption of Uniform Conditions of Approval and Reciprocal Recognition of Approval for Motor Vehicle Equipment and Parts, or in which they accede to that Agreement, and the numbers thus assigned shall be communicated by the Secretary-General of the United Nations to the Contracting Parties to the Agreement.The distinguishing numbers of the Contracting Parties to the 1958 Agreement are reproduced in Annex 3 to the Consolidated Resolution on the Construction of Vehicles (R.E.3), document ECE/TRANS/WP.29/78/Rev.8 - https://unece.org/transport/vehicle-regulations/wp29/resolutions

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Q2Why it changed

Proposed by: Expert from the Kingdom of the Netherlands on behalf of the Task Force on Automated Vehicles Regulatory Screening (TF-AVRS)
Working party: GRSG, 131st session (April 2026)

Reasons

Supplement 5 is introduced to take into account vehicles of categories X and Y. It is also introduced to take into account vehicles with an ADS and a manual mode operating at speeds above 6 km/h.
Sources (2)
“Supplement 5 to the original version of the UN Regulation is introduced to take into account vehicles of categories X and Y”
ECE/TRANS/WP.29/2026/110para. 0.1.
“as well as vehicles with a manual mode operating at speeds above 6 km/h which are equipped with an Automated Driving System (ADS)”
ECE/TRANS/WP.29/2026/110para. 0.1.
The Regulation was originally drafted for vehicles with a driver, a driver cab and manual driving controls. The amendment intends to keep the spirit of the Regulation. It also intends to extend the application of the Regulation to vehicles without a driver and/or driver cab and without manual driving controls.
Sources (2)
“The UN Regulation was originally drafted for vehicles with driver, driver cab and manual driving controls.”
ECE/TRANS/WP.29/2026/110para. 0.1.1.
“It is the intention of this new amendment to keep the spirit of the UN Regulation and to extend its application to vehicles without driver and/or driver cab and without manual driving controls in the vehicle.”
ECE/TRANS/WP.29/2026/110para. 0.1.1.
The definition in paragraph 2.5. is amended to account for vehicles without a driver’s cab.
Source
“The definition in paragraph 2.5. has been amended to account for vehicles without a driver’s cab.”
ECE/TRANS/WP.29/2026/110para. 0.1.2.
Proposer's reason (informal document GRSG-131-25)
The 350 mm distance is the 300 mm maximum rear extension plus the 50 mm suppression dimension. Regulation (EU) 2021/535, Annex VIII, paragraph 4.8.3.4 and Figure 3 specify this suppression dimension.
Submitted by Expert from the Kingdom of the Netherlands on behalf of the Task Force on Automated Vehicles Regulatory Screening (TF-AVRS). Working party adoption: ECE/TRANS/WP.29/GRSG/110, para. 37.
Source
“The 350 mm distance corresponds to the 300 mm maximum rear extension plus the 50 mm suppression dimension specified in Regulation (EU) 2021/535, Annex VIII, paragraph 4.8.3.4 and Figure 3.”
GRSG-131-25II. Justification, para. 2

Document trail

2025-07ProposalECE/TRANS/WP.29/GRSG/2025/23Proposal by the expert from the Kingdom of the Netherlands on behalf of TF-AVRS
—RevisedGRSG-131-25Revised TF-AVRS proposal that replaced ECE/TRANS/WP.29/GRSG/2025/23
—Working party adoptsECE/TRANS/WP.29/GRSG/110Session report, para. 37
2026-04Sent to WP.29ECE/TRANS/WP.29/2026/110Text that GRSG sent to WP.29 and AC.1
—Amended in sessionWP.29-199-10Amendment to footnote 1, reproduced in Annex VI of ECE/TRANS/WP.29/1192
2026-06-24WP.29 adoptsECE/TRANS/WP.29/1192Adopted at the 199th session (session report, para. 103)
PendingIn forceDate not yet known

Q3Who is affected

Vehicle manufacturer

For category Y vehicles without a cab, use the theoretical plane of paragraph 2.5. as the cab rear panel. Find this plane 350 mm behind the rearmost point of the tyre of the foremost front axle.
For a vehicle without “driver/driver cab/manual driving controls”, list the provisions related to them. Then find which of them this amendment already covers (para. 0.1.1.).
For a vehicle with an ADS, do not plan for special provisions or exemptions in any driving mode (para. 0.1.3.).

Component supplier

Ask the manufacturer if the vehicle is of category Y without a cab, because paragraph 2.5. depends on this.
Ask the manufacturer if the vehicle has “driver/driver cab/manual driving controls”, because paragraph 0.1.1. depends on this.

Technical service / Approval authority

For category Y vehicles without a cab, check the position of the theoretical plane against paragraph 2.5.
For a vehicle without “driver/driver cab/manual driving controls”, leave out the related provisions that this amendment does not already cover (para. 0.1.1.).
Use Annex 3 to R.E.3, document ECE/TRANS/WP.29/78/Rev.8, for the distinguishing numbers of the Contracting Parties.

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