Proposal to update UN R49 to accommodate Automated Driving Systems (ADS). The supplement modifies definitions, mass calculations, warning systems, and testing procedures to apply to vehicles without human drivers. References to drivers are replaced with “vehicle user” terminology, and special provisions are added for ADS-equipped vehicles in testing and operational requirements.

This Supplement proposes to update UN R154 to accommodate vehicles fitted with Automated Driving Systems (ADS), specifically categories X and Y. Amendments include new definitions for ADS-related terms, modifications to testing procedures, and updated references to vehicle construction standards. Driver-related systems are renamed to account for vehicles without human drivers. Special provisions establish requirements for ADS road load determination and testing modes, while messaging systems are adapted to send signals to ADS instead of or in addition to driver notifications.

TF-AVRS screened UN Regulations for automated vehicle application, focusing on UN R83 and UN R154. Changes enable automated driving system vehicles to perform driver-conducted tests like coast-down tests and roller bench cycles. Modifications include defining vehicle users as drivers or ADS users, adjusting driver mass calculations for X and Y categories, and updating testing mode terminology. TF-AVRS proposes amendments to 17 UN Regulations and seeks guidance on addressing remaining topics.