This status report from GRE TF AVSR discusses development of a Hybrid Regulation on ADS Marker Lamps for power-driven vehicles. The TF addresses colour specifications aligned with SAE J3134 and ECE R65 standards. Key open questions for GRE guidance include: whether pulsating luminous intensity patterns should be permitted; potential conflict with the 1968 Vienna Convention on Road Traffic; application to platooning trucks and agricultural vehicles; inclusion of L₆ and L₇ categories; mandatory versus optional rear installation; variable luminous intensity based on environmental conditions; side marker lamp integration possibilities; and reciprocal incorporation with other lamps.

FIA proposes that vehicles in automated mode in mixed traffic should be marked with one light visible from all sides. Marker lights should have uniform colour and shape clearly distinguished from other signal lights, be positioned at sufficient distance from signal lights and headlamps to avoid impairing visibility, and be designed to not glare other road users.

The GRE Taskforce on Autonomous Vehicle Signalling discussed Automated Driving System marker lamps, including Japanese input on Vienna Convention compliance, vehicle categories under the 1958 Agreement, mandatory rear installation requirements, variable intensity settings, daytime/nighttime definitions, side marker lamp configurations, agricultural vehicle applicability, rooftop installation alternatives, and operational conditions adjacent to direction indicators. Several technical issues remain unresolved. An informal proposal for a hybrid regulation is expected for the 95th GRE session. The next meeting is scheduled for 18 June 2026.

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