Exploring the Impact of Interconnected External Interfaces in Autonomous Vehicles on Pedestrian Safety and Experience

Tran, TTM; Parker, C; Hoggenmüller, M; Wang, Y; Tomitsch, M

Exploring the Impact of Interconnected External Interfaces in Autonomous Vehicles on Pedestrian Safety and Experience

Tran, TTM Parker, C Hoggenmüller, M Wang, Y

Tomitsch, M

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Publisher:: ASSOC COMPUTING MACHINERY
Publication Type:: Conference Proceeding
Citation:: Conference on Human Factors in Computing Systems - Proceedings, 2024
Issue Date:: 2024-05-11

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Field	Value	Language
dc.contributor.author	Tran, TTM
dc.contributor.author	Parker, C
dc.contributor.author	Hoggenmüller, M
dc.contributor.author	Wang, Y https://orcid.org/0000-0003-2610-1283
dc.contributor.author	Tomitsch, M https://orcid.org/0000-0003-1998-2975
dc.date	2024-05-11
dc.date.accessioned	2025-03-03T00:20:15Z
dc.date.available	2025-03-03T00:20:15Z
dc.date.issued	2024-05-11
dc.identifier.citation	Conference on Human Factors in Computing Systems - Proceedings, 2024
dc.identifier.uri	http://hdl.handle.net/10453/185482
dc.description.abstract	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.
dc.language	en
dc.publisher	ASSOC COMPUTING MACHINERY
dc.relation	http://purl.org/au-research/grants/arc/DP200102604
dc.relation.ispartof	Conference on Human Factors in Computing Systems - Proceedings
dc.relation.ispartof	CHI Conference on Human Factors in Computing Sytems (CHI)
dc.relation.isbasedon	10.1145/3613904.3642118
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	1202 Building, 1503 Business and Management
dc.subject.classification	3507 Strategy, management and organisational behaviour
dc.title	Exploring the Impact of Interconnected External Interfaces in Autonomous Vehicles on Pedestrian Safety and Experience
dc.type	Conference Proceeding
utslib.location.activity	HI, Honolulu
utslib.for	1202 Building
utslib.for	1503 Business and Management
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Provost
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Computer Science
pubs.organisational-group	University of Technology Sydney/Provost/TD School
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-03-03T00:20:13Z
pubs.finish-date	2024-05-16
pubs.publication-status	Published
pubs.start-date	2024-05-11

Abstract:

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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http://hdl.handle.net/10453/185482