Human-Machine Interfaces (HMIs) for automated vehicles (AVs) are typically divided into two categories: internal HMIs for interactions within the vehicle, and external HMIs for communication with other road users. In this work, we examine the prospects of bridging these two seemingly distinct domains. Through a participatory workshop with automotive user interface researchers and practitioners, we facilitated a critical exploration of holistic HMI design by having workshop participants collaboratively develop interaction scenarios involving AVs, in-vehicle users, and external road users. The discussion offers insights into the escalation of interface elements as an HMI design strategy, the direct interactions between different users, and an expanded understanding of holistic HMI design. This work reflects a collaborative effort to understand the practical aspects of this holistic design approach, offering new perspectives and encouraging further investigation into this underexplored aspect of automotive user interfaces.

翻译：自动化车辆（AVs）的人机界面（HMI）通常分为两类：用于车内交互的内部HMI，以及用于与其他道路使用者通信的外部HMI。在本研究中，我们探讨了弥合这两个看似不同领域的可能性。通过与汽车用户界面研究人员和实践者共同参与的研讨会，我们引导参与者协作开发涉及AVs、车内用户和外部道路使用者的交互场景，从而对整体HMI设计进行批判性探索。讨论揭示了界面元素升级作为HMI设计策略的潜力、不同用户之间的直接互动，以及对整体HMI设计更广泛的理解。这项工作反映了为理解这种整体设计方法的实践方面所做的协作努力，提供了新的视角，并鼓励对这一汽车用户界面中尚未充分探索的方面进行进一步研究。