Cyclists’ eye movements and crossing judgments at uncontrolled intersections
An eye-tracking study using animated video clips
N Kovácsová (TU Delft - Biomechatronics & Human-Machine Control)
C.D.D. Cabrall (TU Delft - Intelligent Vehicles)
S.J. Antonisse (Student TU Delft)
T. De Haan (Student TU Delft)
R. van Namen (Student TU Delft)
J.L. Nooren (Student TU Delft)
R. Schreurs (Student TU Delft)
Marjan Hagenzieker (TU Delft - Transport and Planning)
J.C.F. de Winter (TU Delft - Human-Robot Interaction, TU Delft - Biomechatronics & Human-Machine Control)
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Abstract
Research indicates that crashes between a cyclist and a car often occur even when the cyclist must have seen the approaching car, suggesting the importance of hazard anticipation skills. This study aimed to analyze cyclists’ eye movements and crossing judgments while approaching an intersection at different speeds. Thirty-six participants watched animated video clips with a car approaching an uncontrolled four-way intersection and continuously indicated whether they would cross the intersection first. We varied (1) car approach scenario (passing, colliding, stopping), (2) traffic complexity (one or two approaching cars), and (3) cyclist’s approach speed (15, 25, or 35 km/h). Results showed that participants looked at the approaching car when it was relevant to the task of crossing the intersection and posed an imminent hazard, and they directed less attention to the car after it had stopped or passed the intersection. Traffic complexity resulted in divided attention between the two cars, but participants retained most visual attention to the car that came from the right and had right of way. Effects of cycling speed on cyclists’ gaze behavior and crossing judgments were small to moderate. In conclusion, cyclists’ visual focus and crossing judgments are governed by situational factors (i.e., objects with priority and future collision potential), whereas cycling speed does not have substantial effects on eye movements and crossing judgments.