UN R157 Supplement 6 (01 series) · UNECE Regulation No. 157 (ECE R157) — Uniform provisions concerning the approval of vehicles with regard to Automated Lane Keeping Systems.
UN R157 — Supplement 6 to the 01 series of amendments
Supplement 5 → 6
- What changed
- If the manufacturer is to take remedial action addressing an ALKS design, the Type Approval Authority must upload the information to DETA.
- New Annex 7 gives guidance on the use of DETA to exchange information on incidents with ALKS.
- The manufacturer must now report critical incidents to the granting type-approval authority.
- Why
- The proposal aligns the exchange of information through DETA with UN Regulation No. 171.
- It also seeks to clarify that the type approval that granted the approval for an ALKS gets the reports from the manufacturer.
- The expert from the United Kingdom proposed improvements to make the text clearer. GRVA adopted the proposal as amended by these improvements.
Q1What changed27 changes
Upload of remedial action information to DETA (Annex 4, para. 3.5.4.1.)
New paragraph 3.5.4.1. applies if remedial action addressing an ALKS design is to be taken by the manufacturer. The Type Approval Authority must then upload the information received from the manufacturer in English to the secure internet database DETA. It must do this without undue delay but no later than 14 days after receipt. The information must be sufficient to understand the incident, the cause of it and the remedial action.
New Annex 7: guidance for data exchange through DETA
New Annex 7 gives guidance to the approval authorities on the use of DETA for paragraph 3.5.4.1. of Annex 4. The authority that granted the approval (the “notifying authority”) puts the information together as PDF files and uploads them to the type-approval number concerned. It then enters a notification with a standard text in the DETA tab “News”. It must do these actions as soon as possible but at least within 14 days on receiving the information on the remedial action. Other approval authorities may submit queries to the notifying authority by e-mail. Information obtained through DETA for this scheme must be protected in a secure manner and used only to prevent negative consequences of ALKS operation.
Reports of critical incidents (Annex 4, para. 3.5.4.)
The manufacturer must report critical incidents to the granting type-approval authority. Before this change, the text said “to the type-approval authorities when critical incidents”. The first sentence, on the monitoring processes, is the same as before.
Vehicle occupants and other road users (para. 5.1.1.)
The activated system must be free of unreasonable risks for the vehicle occupants and any other road users. Before this change, the text said “the vehicle occupants or any other road users”. A comma now follows “perform the DDT”.
Designation of a “revision” (para. 10.1.1.)
Paragraph 10.1.1. applies when particulars recorded in the information documents have changed. The modification is a “revision” if the Type Approval Authority considers that the modifications are unlikely to have appreciable adverse effects. The words “and that in any case the foot controls still meet the requirements” are removed.
Introduction: speed limit sentence and “deactivate”
The Introduction no longer says that the original text of this Regulation limits the operational speed to 60 km/h maximum. It now says that the driver can always deactivate the system, at any time. Before this change, it said “override”.
Q2Why it changed
- Proposed by
- Expert from the International Organization of Motor Vehicle Manufacturers
- Working party
- GRVA, 25th session (June 2026)
Reasons
The proposal seeks to clarify that the type approval that granted the approval for an ALKS gets the reports from the manufacturer.
Source
“The modifications proposed in this document seek clarification, that the type approval, that granted the approval for an ALKS, shall be provided with reports by the manufacturer.”
The proposal follows paragraph 7.2.2.2. of UN Regulation No. 171 on Driver Control Assistance Systems. It proposes to upload information received from the manufacturer on remedial action addressing an ALKS design, if any, to DETA.
Source
“In line with the UN Regulation No. 171 on Driver Control Assistance Systems (paragraph 7.2.2.2.), it is proposed to upload information received from the manufacturer regarding remedial action addressing an ALKS design, if any, to the secure internet database “DETA”.”
Proposer's reason (informal document GRVA-25-29)
The reference to 60 km/h is no longer relevant with the changes of the 01 series of amendments. Removing it avoids confusion.
Submitted by Experts from the United Kingdom. Working party adoption: ECE/TRANS/WP.29/GRVA/25, para. 24.
Sources (2)
“one is to remove the reference to 60 km/h since this is no longer relevant with the changes of the 01 series of amendments.”
“it is now irrelevant and removing it avoids any confusions.”
Proposer's reason (informal document GRVA-25-29)
It is not possible to override ALKS at any time, as some inputs may be suppressed if they are considered to be done in error. However, it should be possible to switch the system off at any point.
Submitted by Experts from the United Kingdom. Working party adoption: ECE/TRANS/WP.29/GRVA/25, para. 24.
Sources (2)
“The other is to refer to ‘deactivate’ not ‘override’, as it is not possible to override ALKS at any time as some inputs may be suppressed if they are considered to be done in error.”
“However, it should be possible to switch the system off at any point.”
Proposer's reason (informal document GRVA-25-29)
Paragraph 5.1.1. should cover both the vehicle occupants and other road users. The reference to foot controls in paragraph 10.1.1. seems to be an erroneous copy from another regulation.
Submitted by Experts from the United Kingdom. Working party adoption: ECE/TRANS/WP.29/GRVA/25, para. 24.
Sources (2)
“The amendment to paragraph 5.1.1. is to avoid issues with interpretation as to it being one or the other, when it should be both the vehicle occupants and other road users.”
“Paragraph 10.1.1. currently refers to foot controls, which seems to be an erroneous copy from another regulation”
Document trail
- 2026-04ProposalECE/TRANS/WP.29/GRVA/2026/13Proposal by the experts from OICA
- —Amended in sessionGRVA-25-29Improvements proposed by the expert from the United Kingdom
- —Working party adoptsECE/TRANS/WP.29/GRVA/25Session report, para. 24
- 2026-09Sent to WP.29ECE/TRANS/WP.29/2026/193Text that GRVA sent to WP.29 and AC.1
- PendingWP.29 voteScheduled for the 200th session (17–20 November 2026)
- PendingIn forceDate not yet known
Q3Who is affected
Vehicle manufacturer
- Update your incident reporting process to report critical incidents to the granting type-approval authority (para. 3.5.4.).
- Make sure your remedial action information is sufficient to understand the incident, its cause and the remedial action (para. 3.5.4.1.).
Component supplier
- No direct action for this role.
Technical service / Approval authority
- As Type Approval Authority, upload to DETA the manufacturer's information on remedial action addressing an ALKS design (para. 3.5.4.1.).
- As Type Approval Authority, upload it in English, without undue delay but no later than 14 days after receipt.
- As notifying authority, enter the notification with the standard text in the DETA tab “News” (Annex 7, para. 2.1.).
- As approval authority, check the “News” section of DETA on a daily basis, as the guidance in Annex 7 recommends.
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ⓘ This report gives advice only. It is not legal or type-approval advice.