29. GRE was briefed on the progress of the task force on the signalling requirements for automated/autonomous vehicles (TF AVSR) (GRE-81-08-Rev.1 and GRE-81-12-Rev.1). GRE noted that TF had not been able to reply to the main question on whether or not there should be a safety requirement for automated/autonomous vehicles to provide specific signals. GRE was not in a position to reach a consensus on this question either. While some experts felt that such signals were necessary for safety reasons, some others held a different view. The expert of SAE pointed out that his organization was developing lamps for automated/autonomous vehicles. GRE decided to request WP.29 for guidance on this matter. The Chair invited GRE experts to provide him with arguments for the request to WP.29 at its session in June 2019.