Exploring advanced restraint technologies for improving safety equity for rear-seat occupants using diverse human...

Area of Science:

• Automotive safety engineering
• Biomechanics
• Human factors in transportation

Background:

• Rising popularity of ridesharing and automated driving increases rear-seat occupancy.
• Vulnerable populations like the elderly and obese are frequent rear-seat passengers.
• Existing rear-seat safety technology lags behind front-seat advancements.

Purpose of the Study:

• Evaluate advanced restraint systems for rear-seat occupant protection.
• Assess the effectiveness of advanced belt features and a self-conforming rear airbag (SCaRAB).
• Mitigate injury risks in severe frontal crashes for diverse rear-seat occupants.

Main Methods:

• Simulated 56 kph frontal crash pulses using finite element (FE) models.
• Utilized 20 morphed FE human body models representing diverse male and female occupants.
• Evaluated injury risks (head/brain, chest, lower extremity, whole-body) with varying belt and airbag designs.

Main Results:

• Advanced belts with SCaRAB reduced whole-body injury risk by up to 42.11% compared to baseline.
• Shorter obese occupants experienced the most significant benefits from advanced restraints.
• Observed trade-offs between head/brain and chest injury risks, indicating complexity in safety equity.

Conclusions:

• Advanced restraint technologies show significant potential for enhancing rear-seat occupant protection.
• Tailored safety solutions are needed to address diverse occupant needs and body types.
• Further research is crucial for achieving equitable safety across all rear-seat passengers.