Automosphere: Exploring Vehicle Heads-Up Display with Weather-Related Windshield Cues for Passive Fatigue Management

Ensafjoo, Mohsen; Li, Jamy · 2026 · Crossref

DOI: 10.4271/12-09-03-0025

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Summary

This paper addresses the problem of passive driver fatigue, a significant cause of road accidents resulting from cognitive underload and monotony, particularly in automated or long-distance driving scenarios. Existing countermeasures, such as audio cues or haptic feedback, often present limitations regarding distraction, impracticality, or user acceptance. The authors propose "Automosphere," a novel concept using a vehicle heads-up display (HUD) to project simulated weather cues onto the windshield. The rationale is that dynamic, naturalistic visual stimuli may enhance vigilance and reduce fatigue without the drawbacks of current solutions. The study aims to evaluate whether these weather-related cues are acceptable and effective compared to a standard speedometer HUD. The researchers conducted a proof-of-concept usability test using a within-participants design with seven participants (aged 18–35). The experiment took place in a parked vehicle to ensure safety while allowing participants to view the displays. Two conditions were compared: a weather condition displaying dynamic, color-changing graphics of sun, clouds, rain, and lightning on the upper windshield, and a control condition displaying a standard speedometer HUD. The weather prototype was built using LED matrices and a digital screen reflecting images onto the windshield. Participants rated system suitability, fatigue levels, and system impression using self-report scales after viewing each condition. Semi-structured interviews were also conducted to gather qualitative feedback on aesthetics, attention, and suggestions. The quantitative results indicated no statistically significant differences between the weather and speed conditions for system suitability or system impression. Fatigue levels were also similar, though a Wilcoxon signed-rank test suggested a borderline significant trend where weather cues might have led to slightly higher fatigue than speed cues, a finding the authors note requires further investigation. Qualitative analysis revealed that participants recognized the potential value of the weather display for combating fatigue during long, monotonous drives. However, users emphasized the importance of proper display placement to avoid obstructing the direct line of sight and suggested that the feature should be user-activated rather than always on to prevent visual strain. The study concludes that while the concept of using simulated weather cues for passive fatigue management is theoretically possible and perceived as potentially useful, further work is needed to prove its efficacy in practice. The findings highlight the importance of user-centered design considerations, such as dynamic graphics, placement, and user control, for the adoption of such in-vehicle smart systems. The research contributes to the field by exploring a novel, non-intrusive visual countermeasure for driver fatigue, suggesting that future iterations should focus on optimizing the display's integration into the driving environment to maximize alertness benefits while minimizing potential distractions or visual fatigue.

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Summary generated by qwen3.6-27b-nvidia on 2026-08-10; verification: verified.

Topics

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• hud ar windshield
• in vehicle displays
• ehmi external hmi
• external distraction

Information type

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• Applied Guidance: design guidelines
• Empirical Findings: physiological data
• Methodological Resource: tool software