UN R178 Base text (01 series) · UNECE Regulation No. 178 (ECE R178) — Uniform provisions concerning the approval of motor vehicles with regard to the Emergency Lane Keeping Systems (ELKS) for M1 and N1 vehicles.
UN R178 — 01 series of amendments
Changes from 00 series of amendments (supplement 1)
- What changed
- New paragraph 5.3. says that magnetic or electrical fields must not adversely affect the effectiveness of ELKS.
- Lane marking references in the requirement and test paragraphs now name the 01 series of amendments to UN Regulation No. 130.
- In new paragraph 14., transitional dates such as [1 May 2027] [1 September 2028] are shown as two options in square brackets.
- Why
- The proposal aims to make sure that an ELKS is not adversely affected by magnetic or electrical fields.
- It includes the latest lane markings in Annex 3 to UN Regulation No. 130, which include Australian lane markings.
- It also aims at consistent and repeatable testing.
Q1What changed33 changes
Effect of magnetic or electrical fields (para. 5.3.)
New paragraph 5.3. says that magnetic or electrical fields must not adversely affect the effectiveness of ELKS. This must be shown by meeting the technical requirements and transitional provisions of the 06 (or later) series of UN Regulation No. 10.
Automatic deactivation in the operating instructions (para. 6.2.2.1.)
The vehicle operating instructions must now also include the list of situations where the ELKS is automatically deactivated. The vehicle manufacturer still provides this list with its criteria, annexed to the test report.
Lane markings of UN Regulation No. 130, 01 series
Lane marking references in the requirement and test paragraphs now name the 01 series of amendments to UN Regulation No. 130. The vehicle manufacturer must demonstrate compliance with all other lane markings in that Annex 3 through documentation. Several paragraphs now say “solid line lane markings” instead of “solid lane markings”.
Lane Keep scenarios and Table 1 (paras. 6.6.2.1. and 8.3.3.1.)
Paragraph 6.6.2.1. applies in the absence of conditions leading to the deactivation or suppression of the system. The CDCF must be able to prevent lane departure by crossing of visible lane markings by no more than a DTLM of – 0.3 m. Before this change, the text said “by more than a DTLM of – 0.3 m”. The text now names the two scenarios (right and left departure) shown in Table 1. Paragraph 8.3.3.1. now refers to the test scenarios in paragraph 6.6.2.1., not to “Nos. 1 and 2” in paragraph 6.6.2.
Test conditions: tyre pressures and warning threshold (paras. 7.2.2.2., 7.2.2.3. and 8.2.2.2.)
The recommended tyre pressures must be appropriate for the load conditions tested, as specified in the vehicle operating instructions. With a user-adjustable warning threshold, the tests use the maximum lane departure setting, which the text now explains as “the latest occurring warning”. The heading of paragraph 6.5. now reads “LDWS performance requirements”.
Transitional provisions with two date options (new paragraph 14.)
From the entry into force, Contracting Parties applying this Regulation must not refuse to grant or accept 01 series type approvals. From [1 May 2027] [1 September 2028], they are not obliged to accept original version approvals first issued after 1 May 2027. Until [1 May 2029] [1 September 2030], they must accept original version approvals first issued before 1 May 2027. From that date, they are not obliged to accept type approvals issued to the original version. Contracting Parties may grant type approvals to any preceding series and must continue to grant extensions of existing approvals.
Approval mark (Annex 2) and footnote 1
In the Annex 2 example, the first two digits of the approval number now show an approval under the 01 series of amendments. Footnote 1 now says that this Regulation in its original version (00 series) is based on European Regulation 2021/646.
Q2Why it changed
- Proposed by
- Expert from Australia
- Working party
- GRVA, 25th session (June 2026)
Reasons
The proposal aims to make sure that an ELKS is not adversely affected by magnetic or electrical fields.
Source
“Ensure that an ELKS is not adversely affected by magnetic or electrical fields;”
Scenarios where the system automatically deactivates to prevent unintended consequences must at least be detailed in the vehicle’s operating instructions.
Source
“Clarify that scenarios where the system automatically deactivates to prevent unintended consequences be at least detailed in the vehicle’s operating instructions;”
The proposal includes the latest lane markings in Annex 3 to UN Regulation No. 130. The 01 series of amendments to UN Regulation No. 130 includes Australian lane markings, which makes sure of compatibility.
Source
“Include the latest lane markings located in Annex 3 to UN Regulation 130. This is important as the 01 series of amendments to UN Regulation 130 includes Australian lane markings, ensuring compatibility;”
The proposal also corrects minor grammatical errors and aims at consistent and repeatable testing.
Sources (2)
“Correct minor grammatical errors;”
“Ensure consistent and repeatable testing.”
Proposer's reason (informal document GRVA-25-54)
The IWG EMC proposes a reference to the 06 or any subsequent series of amendments to UN Regulation No. 10. This brings the requirements regarding emissions into line with the current state of the art.
Submitted by Expert from the European Commission and Germany. Working party adoption: ECE/TRANS/WP.29/GRVA/25, para. 53.
Source
“The IWG EMC discussed the working document and proposes referring to the 06 or any subsequent series of amendments. This will bring the requirements regarding emissions into line with the current state of the art.”
Document trail
- —ProposalGRVA-24-05-Rev.2Informal proposal by Australia at the 24th GRVA session
- 2026-04RevisedECE/TRANS/WP.29/GRVA/2026/20Official proposal by the expert from Australia
- —Amended in sessionGRVA-25-55-Rev.1Supplement to the proposal by Australia
- —Amended in sessionGRVA-25-54Reference to the 06 series of UN Regulation No. 10, by the European Commission and Germany
- —Working party adoptsECE/TRANS/WP.29/GRVA/25Session report, para. 53
- 2026-09Sent to WP.29ECE/TRANS/WP.29/2026/195Text that GRVA sent to WP.29 and AC.1, subject to final review by GRVA in September 2026
- PendingWP.29 voteScheduled for the 200th session (17–20 November 2026)
- PendingIn forceDate not yet known
Q3Who is affected
Vehicle manufacturer
- Demonstrate under UN Regulation No. 10, 06 (or later) series, that magnetic or electrical fields do not adversely affect ELKS.
- Add the list of situations where the ELKS is automatically deactivated to the vehicle operating instructions (6.2.2.1.).
- Update the documentation of compliance with the lane markings in Annex 3 to UN Regulation No. 130, 01 series.
- Check the dates of paragraphs 14.1.2. to 14.1.4.; each gives its start or end date as two bracketed options.
Component supplier
- No direct action for this role.
Technical service / Approval authority
- Use test lane markings in line with one of those in Annex 3 to UN Regulation No. 130, 01 series.
- Test at tyre pressures appropriate for the load conditions tested, as the vehicle operating instructions specify (7.2.2.2., 8.2.2.2.).
- Test the two Table 1 scenarios and check that the DTLM is no more than – 0.3 m (6.6.2.1.).
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ⓘ This report gives advice only. It is not legal or type-approval advice.