Color and Animation Preferences for a Light Band eHMI in Interactions Between Automated Vehicles and Pedestrians

Debargha Dey · Azra Habibovic · Bastian Pfleging · Marieke Martens · Jacques M. B. Terken

157 citations0/0 files storedCHI Conference on Human Factors in Computing Systems

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Human-Automation Interaction and Safety Traffic and Road Safety Social Robot Interaction and HRI

Abstract

In this paper, we report user preferences regarding color and animation patterns to support the interaction between Automated Vehicles (AVs) and pedestrians through an external Human-Machine-Interface (eHMI). Existing concepts of eHMI differ -- among other things -- in their use of colors or animations to express an AV's yielding intention. In the absence of empirical research, there is a knowledge gap regarding which color and animation leads to highest usability and preferences in traffic negotiation situations. We conducted an online survey (N=400) to investigate the comprehensibility of a light band eHMI with a combination of 5 color and 3 animation patterns for a yielding AV. Results show that cyan is considered a neutral color for communicating a yielding intention. Additionally, a uniformly flashing or pulsing animation is preferred compared to any pattern that animates sideways. These insights can contribute in the future design and standardization of eHMIs.

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References

2010Five-Point Likert Items: t test versus Mann-Whitney-Wilcoxon 2019External Human-Machine Interfaces on Automated Vehicles: Effects on Pedestrian Crossing Decisions 2018Communicating Intent of Automated Vehicles to Pedestrians 2017A Comparison of Parametric and Non-Parametric Methods Applied to a Likert Scale 2017Development and validation of a questionnaire to assess pedestrian receptivity toward fully autonomous vehicles 2018An experimental study to investigate design and assessment criteria: What is important for communication between pedestrians and automated vehicles?2013Likert Data: What to Use, Parametric or Non-Parametric?2021Economic Commission for Europe

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