Seating position in cars and fatality risk

Area of Science:

• Traffic Safety Research
• Accident Analysis
• Occupant Protection

Background:

• Understanding occupant fatality risk by seating position is crucial for vehicle safety design and public awareness campaigns.
• Previous research often did not adequately control for occupant characteristics that may correlate with seating position choice.

Purpose of the Study:

• To analyze and compare passenger car occupant fatality risk based on specific seating positions (front vs. rear, outboard vs. center).
• To isolate the effect of seating position on fatality risk, independent of occupant demographics and restraint use.

Main Methods:

• Utilized the Fatal Accident Reporting System (FARS) database covering data from 1975 to 1985.
• Compared fatality risks of unrestrained occupants, matched for sex and age (within three years), across different seating positions.
• Analyzed data for all crash directions and specifically for frontal crashes.

Main Results:

• Driver and right front passenger fatality risks were statistically similar (within 1%).
• Rear seat occupants had a fatality risk approximately 26% lower than front seat occupants.
• Center seats showed lower fatality risk compared to outboard seats: 22% lower in the front and 15% lower in the rear. The center rear seat had the lowest overall fatality risk.

Conclusions:

• Seating position significantly impacts passenger car occupant fatality risk.
• The center rear seating position offers the greatest protection against fatal injury in car crashes.
• Vehicle safety recommendations and design should consider the differential risk associated with various seating positions.