Exploring the Impact of Interconnected External Interfaces in Autonomous Vehicleson Pedestrian Safety and Experience
arxiv(2024)
摘要
Policymakers advocate for the use of external Human-Machine Interfaces
(eHMIs) to allow autonomous vehicles (AVs) to communicate their intentions or
status. Nonetheless, scalability concerns in complex traffic scenarios arise,
such as potentially increasing pedestrian cognitive load or conveying
contradictory signals. Building upon precursory works, our study explores
'interconnected eHMIs,' where multiple AV interfaces are interconnected to
provide pedestrians with clear and unified information. In a virtual reality
study (N=32), we assessed the effectiveness of this concept in improving
pedestrian safety and their crossing experience. We compared these results
against two conditions: no eHMIs and unconnected eHMIs. Results indicated
interconnected eHMIs enhanced safety feelings and encouraged cautious
crossings. However, certain design elements, such as the use of the colour red,
led to confusion and discomfort. Prior knowledge slightly influenced
perceptions of interconnected eHMIs, underscoring the need for refined user
education. We conclude with practical implications and future eHMI design
research directions.
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