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Visual perception and ergonomic influences: Assessing blind spot variability and distance estimation through
1Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India.
Ergonomics
|July 30, 2025
Summary
Car side-view mirrors present blind spots and perception errors, especially for motorcyclists. The left mirror shows larger blind spots and greater distance overestimation, increasing crash risks.
Area of Science:
- Road safety engineering
- Human factors in transportation
- Vehicle dynamics and perception
Background:
- Car-motorised two-wheeler (MTW) interactions are a significant global safety challenge in urban mixed traffic.
- Convex side-view mirrors are crucial for driver visibility but present challenges like blind spots and perception errors.
- Understanding these challenges is vital for reducing MTW-related accidents.
Purpose of the Study:
- To investigate blind spot variability and perception errors in car side-view mirrors during MTW interactions.
- To explore driver-specific ergonomic factors influencing mirror visibility.
- To provide data for improving mirror design, driver education, and traffic safety policies.
Main Methods:
- Conducted a study with professional car drivers to assess side-view mirror performance.
- Quantified blind spot areas for left-side (passenger) and right-side (driver) mirrors.
- Analyzed driver perception errors, specifically overestimation of MTW distances.
- Explored ergonomic factors like eye-to-mirror and eye-to-dashboard distances.
Main Results:
- The left-side mirror exhibited a larger blind spot area (14.57 m²) compared to the right-side mirror (12.15 m²).
- Drivers demonstrated a tendency to overestimate the distance to MTWs, with more significant errors observed in the left-side mirror.
- Driver-specific ergonomic factors were explored in relation to mirror visibility.
Conclusions:
- Left-side mirrors pose a higher crash risk due to larger blind spots and greater distance overestimation.
- Improved mirror design, enhanced driver training, and targeted policy interventions are necessary.
- Addressing these issues can significantly improve driver awareness and mitigate MTW-related crashes.
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