Display in the Air: Balancing Distraction and Workload in AR Glasses Interfaces for Driving Navigation

TL;DR

This study investigates optimal AR interface designs for driving navigation, finding that bottom-center icon placement best balances driver distraction and workload through real-world testing and user feedback.

Contribution

It provides new insights into icon placement strategies for AR glasses in driving, emphasizing real-world testing and offering specific design recommendations.

Findings

Bottom-center icon placement reduces distraction and workload.

Real-world testing yields different preferences than simulated scenarios.

Four design implications for AR navigation interfaces are proposed.

Abstract

Augmented Reality (AR) navigation via Head-Mounted Displays (HMDs), particularly AR glasses, is revolutionizing the driving experience by integrating real-time routing information into the driver's field of view. Despite the potential of AR glasses, the question of how to display navigation information on the interface of these devices remains a valuable yet relatively unexplored research area. This study employs a mixed-method approach involving 32 participants, combining qualitative feedback from semi-structured interviews with quantitative data from usability questionnaires in both simulated and real-world scenarios. Highlighting the necessity of real-world testing, the research evaluates the impact of five icon placements on the efficiency and effectiveness of information perception in both environments. The experiment results indicate a preference for non-central icon placements, especially bottom-center in real world, which mostly balances distraction and workload for the driver. Moreover, these findings contribute to the formulation of four specific design implications for augmented reality interfaces and systems. This research advances the understanding of AR glasses in driving assistance and sets the stage for further developments in this emerging technology field.