Hanger Reflex Based Driving Assistance for Drivers with Peripheral Visual Field Defects

2026-06-01

AI Summary

This study addresses the heightened collision risk faced by drivers with peripheral visual field loss, who often fail to promptly detect pedestrians approaching from the side. To mitigate this issue, the authors introduce, for the first time, a Haptic Reflexive Cue (HRC) into driver assistance systems, delivering targeted mechanical tactile stimuli to specific regions of the head to proactively guide drivers to turn their heads and allocate visual attention toward potential hazards. Using a driving simulator experiment integrated with head-motion tracking, eye-tracking, and piecewise structural equation modeling, the results demonstrate that HRC significantly increases both the head rotation angle toward hazardous pedestrians and the duration of visual fixation, thereby substantially reducing collision rates. The findings further uncover a behavioral mediation pathway—“head movement → visual fixation → collision avoidance”—offering a novel paradigm for proactive risk perception in driving assistance.

Abstract

Drivers with peripheral visual field defects may fail to notice pedestrians in their peripheral visual field, leading to delayed hazard awareness and increased collision risk. This study explores hanger reflex cue (HRC) as a driving assistance method for drivers with peripheral visual field defects, in which mechanical pressure is applied to specific regions of the head to facilitate anticipatory orientation toward potentially risky pedestrians and support safer driving. In a driving simulator experiment with 15 participants, we compared driving behavior with and without HRC during pedestrian encounters under simulated peripheral visual field defect. The results showed that HRC significantly shifted drivers' modal head rotation angle toward the risky pedestrian and significantly increased gaze duration toward that pedestrian. Collision occurrence was lower in the w/ HRC condition than in the w/o HRC condition, although the direct effect of HRC on collision occurrence showed only a marginal trend. A piecewise structural equation modeling analysis further suggested that HRC may contribute to collision reduction through a sequential pathway from head rotation to gaze allocation and then to collision occurrence. These findings provide preliminary evidence that HRC can support anticipatory attention allocation toward peripheral hazards and may offer a promising driving assistance method for drivers with visual field impairment.

Problem

• peripheral visual field defects
• hazard awareness
• collision risk
• driving assistance
• pedestrian detection

Innovation

• hanger reflex
• driving assistance
• peripheral visual field defect
• anticipatory attention
• gaze allocation