GRVA/2025/2
UN R157: Proposal for a Supplement to the 01 series of amendments

Proposal to limit regular lane changes to roads “where it is possible to assess and handle the speed of an approaching vehicle” and to restrict lane changes by heavy vehicles (M3 and N3) to roads where the maximum permissible speed of target lane is “limited for all vehicle categories”.

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Excerpts from session reports
GRVA | Session 20 | 23-27 Sep 2024

20. The representative of Germany presented GRVA-20-04, proposing a supplement to the 01 series of amendments to UN Regulation No. 157 aimed at addressing the content of the footnote in paragraph 5.2.6.5.1 that GRVA agreed to revisit at this session. He proposed that lane changes for heavy vehicles be authorized in a target lane for which the speed limit was identified.
21. The representative of the United Kingdom of Great Britain and Northern Ireland recalled to GRVA that he conducted a survey with the Contracting Parties within the Special Interest Group for UN Regulation No. 157 and that there was a consensus on removing the footnote. He mentioned that only Germany proposed a substitute.
22. The representative of OICA inquired whether more flexibility could be accepted in situations where the system identified that a lane change was uncritical.
23. The representative of the Netherlands inquired about the justification for removing the footnote. He stated that the German proposal was a sensible way forward in case the footnote would be deleted.
24. The representative of Japan could agree to the proposal. He suggested finding a more general text.
25. The representative of Sweden identified situations that could be dangerous also in cases where the speed limit can be identified, e.g., when the ego vehicle has a very slow speed.
26. GRVA agreed to continue this discussion and requested the secretariat to distribute GRVA-20-04 with an official symbol at its January 2025 session.
27. GRVA considered GRVA-20-42 (superseding ECE/TRANS/WP.29/GRVA/2024/30 and ECE/TRANS/WP.29/GRVA/2024/40) at the same time as GRVA-20-43 under agenda item 6(b). GRVA requested the secretariat to distribute GRVA-20-42 with an official symbol at the January 2025 session.

GRVA | Session 22 | 2-6 Jun 2025

6. GRVA considered the provisional agenda prepared for its twenty-second session (ECE/TRANS/WP.29/GRVA/2025/2). GRVA adopted it as reproduced in GRVA-22-02, which includes references to all informal documents received until 2 June 2025 with the follow addition: an additional agenda item 13(d) “Capacity building”. (All informal documents considered during the session are listed in Annex I of this report. Annex II provides the list of Informal Working Groups (IWG) reporting to GRVA.)

7. GRVA also agreed on the running order prepared for the session (see informal document GRVA-22-01).