GRVA-25-08
Blind Spot Information System for the Detection of Bicycles

Based on GRVA-25-08, the document addresses blind spot accidents involving right-turning trucks and bicycles. It distinguishes between warning systems requiring driver reaction time and automatic brake intervention systems. The document notes that information systems with low intensity have low annoyance and low risk of deactivation, while high-intensity warnings risk driver annoyance and deactivation. It describes a specific scenario at approximately 15 km/h where a truck brakes after a turn has started with a bicycle detected at high confidence. The document indicates that next steps in safety regarding blind spot accidents should involve automatic brake intervention and suggests future discussion of UN R151 in GRVA.

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Excerpts from session reports
GRVA | Session 25 | 18-22 May

55. During the consultations, the expert from Japan, Co-Chair of the Informal Working Group (IWG) on Advanced Emergency Braking Systems (AEBS), presented the status report of the group (GRVA-25-49). He highlighted the outcome of the group’s first meeting, its proposal for amendments to the terms of reference (GRVA-25-50/Rev.1), and the tentative schedule of future meetings. The expert from Germany presented considerations regarding a Blind Spot Information System for the detection of bicycles and proposed exploring automatic brake intervention in the context of blind-spot-related safety, possibly under UN Regulation No. 151. The experts did not reach consensus and agreed to continue discussions in September 2026. The expert from Australia introduced ECE/TRANS/WP.29/GRVA/2026/21, aimed at addressing ambiguities in the 02 series of amendments to UN Regulation No. 152 and its supplements, as well as ECE/TRANS/WP.29/GRVA/2026/22, containing editorial amendments.

56. GRVA endorsed the status report of the IWG on AEBS (GRVA-25-49).

57. GRVA adopted the revised terms of reference for the IWG on AEBS (GRVA-25-50/Rev.1 reproduced in Annex III).

58. GRVA decided to defer ECE/TRANS/WP.29/GRVA/2026/21 and GRVA-25-36 to the IWG on AEBS.

59. GRVA adopted ECE/TRANS/WP.29/GRVA/2026/22 and requested the secretariat to submit it to WP.29 and AC.1 as draft supplements to the original version and 01 series of amendments to UN Regulation No. 152 for consideration and vote in November 2026.

60. GRVA agreed to resume discussion of GRVA-25-08 in September 2026.