UN R157 Supplement 5 (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 5 to the 01 series of amendments
Supplement 4 → 5
- What changed
- New paragraph 1.2.: this Regulation does not apply to vehicles with regards to an ALKS approved as an ADS feature under the Regulation on ADS.
- Why
- Vehicles with an ALKS fall within the scope of both UN Regulation No. 157 and the future UN Regulation on ADS.
- Manufacturers should not need ALKS approvals to both regulations. They should be able to choose approval to either regulation.
Q1What changed1 change
Scope: ALKS approved as an ADS feature (para. 1.2.)
This Regulation does not apply to vehicles with regards to an ALKS approved as an ADS feature under the Regulation on ADS. Paragraph 1.2. refers to approval under the “Regulation on uniform provisions concerning the approval of motor vehicles with regard to their Automated Driving Systems”. Before this supplement, paragraph 1.2. did not exist.
Q2Why it changed
- Proposed by
- Task force on regulatory fitness for Automated Driving Systems (FADS)
- Working party
- GRVA, 24th session (January 2026)
Reasons
Vehicles with an ALKS fall within the scope of both UN Regulation No. 157 and the future UN Regulation on Automated Driving Systems (ADS).
Source
“Vehicles with ALKS fall within scope of both UN Regulation No. 157 and forthcoming UN Regulation on Automated Driving Systems (ADS).”
Experts in the GRVA workshops on ADS agree that manufacturers should not need ALKS approvals to both regulations. Manufacturers should be able to choose approval to either regulation.
Sources (2)
“Consensus amongst experts participating in the GRVA workshops on ADS is that manufacturers should not be required to approve ALKS functionality to both regulations.”
“Manufacturers should be able to choose approval to either regulation.”
A complementary provision removes ALKS functions approved to UN Regulation No. 157 from the scope of the future UN Regulation on ADS.
Source
“There is a complementary provision which removes ALKS functionality approved to UN Regulation No. 157 from the scope of the forthcoming UN Regulation on ADS.”
Document trail
- 2025-11ProposalECE/TRANS/WP.29/GRVA/2026/6Task force proposal for several UN Regulations, including No. 157
- —Working party adoptsECE/TRANS/WP.29/GRVA/24Session report, para. 35
- 2026-04Sent to WP.29ECE/TRANS/WP.29/2026/85Text that GRVA sent to WP.29 and AC.1
- 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 each vehicle, decide if the ALKS gets approval to this Regulation or as an ADS feature (para. 1.2.).
- Update the approval documents that quote the scope of this Regulation to include new paragraph 1.2.
Component supplier
- Ask the vehicle manufacturer if the ALKS approval will be to this Regulation or as an ADS feature (para. 1.2.).
Technical service / Approval authority
- Before you start an approval to this Regulation, check if the ALKS has approval as an ADS feature (para. 1.2.).
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ⓘ This report gives advice only. It is not legal or type-approval advice.