Influencing Speed Perception through Visual Cues in the ... · Influencing speed perception through...
Transcript of Influencing Speed Perception through Visual Cues in the ... · Influencing speed perception through...
Influencing speed perception through visual cues in the driving environment
Jennifer Sudkamp & Eirin Olaussen Ryeng
Factors influencing drivers’ choice ofspeed
WHO (2004). World report on road traffic injury prevention.
Determinants of speed perception
• Visual cues
• Haptic cues
• Auditory cues
• Centrifugal forces
Optical Flow
Gibson (1979). The ecological approach to visual perception.
Edge Rate
Perceptual countermeasures to speeding
Katz (2004). Pavement Markings for Speed Reduction.
Illusion of acceleration
Wan et al. (2015). Speed control method for highway tunnel safety on visual illusion.
Study 1 - How does edge rate influence speed perception?
High Frequency Medium Frequency Low Frequency
Distance 2 m 4 m 8 m
Edge Rate at 60kmh 8.33 Hz 4.17 Hz 2.08 Hz
Speed-discrimination task
Standard Comparison
60 km/h 40 – 80 km/h
Faster, equal or slower?
Standard
Faster? Equal? Slower?
Sample data
Hypotheses
• High frequencies
Overestimation of speed
Lower point of subjective equality
• Low frequencies
Underestimation of speed
Higher point of subjective equality
Outlook
Will the results be reflected on the behavioral level?
- A driving simulator study -
Outlook
How does multifrequent edge rate information affectspeed perception?
Wan et al (2015). Speed control method for highway tunnel safety based on visual illusion.
Conclusions on design
• Perceptual countermeasures to speeding
• Road environments that support adequate speed choices