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.

Proposal to amend UN R157 for Automated Driving Systems in vehicles of categories X and Y:

• Insert new paragraphs 0.8. to 0.8.2. introducing Supplement 5 to address vehicles of categories X and Y equipped with an Automated Driving System
• Amend para. 1.1. to specify applicability to vehicles of categories N₂, N₃, M₂ and M₃
• Insert new para. 1.3. excluding vehicles of category Y and vehicles of category X without a manual mode intended to be operated on-board the vehicle
• Amend para. 2.5. to define “Ocular reference point”
• Insert new para. 2.20. to define “Safety Concept”
• Amend para. 4.5. regarding affixing of approval marks and its footnote 2
• Amend para. 5.1. to provide for automatic deactivation of BSIS in specified situations and compliance with UN Regulation No. [XXX] for vehicles equipped with an ADS
• Insert new para. 5.2.3. permitting alternative requirements for vehicles of category X with manual mode not using a driver’s seat
• Amend Annex 2 to correct the heading and modify paragraph references
• Amend Annex 4, Appendix, Table 1, footnote 1

Proposal to amend UN R151 (Blind Spot Information Systems) to account for vehicles of categories X and Y equipped with an Automated Driving System. BSIS is required to work when a driver is in control; vehicles of category Y and vehicles of category X without a manual mode intended to be operated on-board the vehicle are not required to comply. Vehicles of category X with a manual mode operated on-board not using a driver’s seat may be approved using alternative requirements demonstrating equivalent safety. The proposal amends scope, definitions, and approval marking provisions. This proposal amends and supersedes ECE/TRANS/GRSG/2026/10.

Clarification request of the consolidated text of paragraph 6.5.10 as amended
by supplement 4

Proposal from the GRSG task force on Automated Vehicles Regulation Screening to enable application of UN R151 to ADS vehicles, including the exemption of vehicle subcategories X and Y from the requirements, and to remove the references to Unique Identifier markings.

Proposal prepared by the Task Force on Automated Vehicles Regulatory Screening (TF-AVRS), with the aim to amend and supersede document
ECE/TRANS/GRSG/2025/38.

Proposal from the GRSG task force on Automated Vehicles Regulation Screening to enable application of UN R151 to ADS vehicles, including the exemption of vehicle subcategories X and Y from the requirements, and to remove the references to Unique Identifier markings.

Proposal to delete the Unique Identifier (UI) marking provisions

Proposal from GRSG to resolve issues with the application of provisions to vehicle configurations for which BSIS may not work correctly (e.g. because of the vehicle body, the vehicle use) to allow more flexibility for system design and facilitate introducing automated brake functions.

Proposal by the IWG VRU-Proxi to amend document GRSG/2022/9 (proposal for amendments to resolve issues with the installation and functioning of BSIS on certain vehicle configurations).

Proposal to introduce appropriate trajectories for each type of M3 vehicle. Envelope 4 represents a specific trajectory for a Class I non-articulated (rigid) M3 vehicle. Envelope 5 represents trajectories for Class II, Class III and articulated M3 vehicles of all classes. The proposal also adds ‘Classification of power-driven vehicles and trailers’ in line with the Consolidated Resolution on the Construction of Vehicles (R.E.3.).

Proposal to resolve issues with the application of provisions to vehicle configurations for which BSIS may not work correctly (e.g. because of the vehicle body, the vehicle use) to allow more flexibility for system design and facilitate introducing automated brake functions.

Proposal to introduce an alternative test procedure without changing the requirements in the core text.

Proposal to introduce an alternative test procedure without changing the requirements in the core text

The text was prepared by the experts from the VRU-Proxi Informal Working Group (VRU-Proxi)

Draft proposal to introduce provisions to ensure inclusion of vehicle configurations for which BSIS may not work correctly (because of the vehicle body, the vehicle use…) within the scope of the regulation.

Supplement 1 to the original version of UN R151 (GRSG/2019/25) amended the paragraph 5.3.1.4. to add an explicit requirement for the maximum detection distance. The Supplement did not intend to delete or suggest a change in the requirements for the information signal boundaries or the detection area around the front wheel. This proposal reintroduces and clarifies the requirement for the detection area around the front wheel.

Draft proposal to exempt certain vehicle configurations from the scope of UN R151.

Proposal from the VRU-Proxi informal group to amend the detection area in the proposal for Supplement 3 to the UN Regulation on blind-spot information systems.

Supplement 1 to the original version of UN R151 (GRSG/2019/25) amended the paragraph 5.3.1.4. to add an explicit requirement for the maximum detection distance. The Supplement did not intend to delete or suggest a change in the requirements for the information signal boundaries or the detection area around the front wheel. This proposal reintroduces and clarifies the requirement for the detection area around the front wheel.

GRSG proposal to remove limitations on the scope of the Regulation (i.e., to expand the scope to all M₂, M₃, N₂, and N₃ vehicles).

Draft report including the post-session follow-up conference on 24 June.

List of items approved during the remote GRSG July session but subject to confirmation via absence of objections following the session. Under the “silence procedure”, if a Contracting Party expresses dissent, the GRSG approval is nullified.

Proposal to amend the test procedures with regard to N₂ and M₂ vehicles.

Proposal to correct values presented in document WP.29/2020/18 and clarification of “first point of information” application in assessment of BSIS.

The text was prepared by the expert from the EC to modify the scope and gives the opportunity for Contracting Parties to apply BSIS prescriptions to all trucks and buses, including small and light ones.

Proposal to

1. clarify test procedures allowing non-random selection of parameter combinations and
2. provide for protrusion requirements for Blind Spot Information Systems (BSIS) external elements.

Proposal to clarify the regulation with regard to cone placement in the test procedure.

Proposal to add the condition " and any part of the vehicle which is more than 2.0 m above the ground" to the definition of the “vehicle front right corner” to ensure that the BSIS detection zone is not adversely affected by specific elements added at later stages of completion of the vehicle (e.g., a crane).

Proposal from the VRU Proximity Awareness informal group to

1. clarify test procedures allowing non-random selection of parameter combinations and
2. provide for protrusion requirements for Blind Spot Information Systems (BSIS) external elements.

Proposal to allow external blind spot information system components integrated into external indirect vision devices (e.g. mirrors) approved under UN R46 to extend up to 250 mm beyond the overall vehicle width. The present text limits installation to 100 mm.

Proposal to explicitly reference consideration of the time to collision in assessing the blind spot detection system performance.

Proposal to define the scope of the new regulation as vehicles of categories N₂ > 8 t and N₃. The proposal argues against inclusion of M₂ and M₃ vehicles.

Proposal to increase the 0.25 m gap between the vehicle and the bicycle to 0.50 m in order to avoid excessive false positive warnings.

Revised version of document GRSG/2018/24 as adopted by GRSG during its 115th session.