Related Experiment Video
Updated: May 27, 2026
07:30
A Test Bed to Examine Helmet Fit and Retention and Biomechanical Measures of Head and Neck Injury in Simulated Impact
Published on: September 21, 2017
Driving position field study, differences with the whiplash protocol and biomechanics experimental responses
Carlos Arregui-Dalmases1, Eduardo Del Pozo, David Lessley
1European Center for Injury Prevention, Preventive and Public Health Dpt. University of Navarra, Spain.
Summary
This study compared real driver positions to EuroNCAP whiplash test dummies. Minor differences in seating position did not significantly alter biomechanical outcomes in low-speed rear impacts.
Area of Science:
- Biomechanics
- Automotive Safety Engineering
- Traffic Accident Analysis
Background:
- Low-speed rear-impact collisions are a significant economic burden in motor vehicle accidents.
- EuroNCAP's whiplash test protocol aims to simulate these low-speed rear impacts.
- Understanding discrepancies between dummy tests and real-world driver positions is crucial for improving whiplash injury prevention.
Purpose of the Study:
- To compare the seating positions of actual drivers with the EuroNCAP whiplash testing protocol.
- To evaluate the biomechanical responses of a BioRID IIg dummy under simulated real-world driving positions versus the standard protocol.
- To assess the influence of seating position variations on key biomechanical metrics in low-speed rear impacts.
Main Methods:
- A field study involving 182 drivers in Spain to record occupant seating positions relevant to rear impacts.
- Statistical analysis of observational data to compare seating parameters (e.g., seatback angle, head restraint distance) with the EuroNCAP protocol.
- Conducting four BioRID IIg dummy tests: one baseline (EuroNCAP protocol) and three variations simulating observed driver positions and a worst-case scenario.
Main Results:
- Observational data revealed slight differences in seatback angle and greater distances between the head and head restraint compared to the EuroNCAP protocol.
- Despite variations in initial driver position, biomechanical outcomes (T1 acceleration, Neck Injury Criterion [NIC], Neck Kinematic Measure [NKM]) showed minimal significant differences.
- A reduced seatback angle was found to be more detrimental to the NIC, indicating a potential increased risk.
Conclusions:
- The current EuroNCAP whiplash test protocol provides a reasonable approximation of real-world driver positions for biomechanical assessment.
- Minor variations in occupant seating position observed in the field study did not lead to substantial changes in key biomechanical injury metrics.
- Further investigation into the impact of seatback angle on whiplash injury risk is warranted, particularly concerning the NIC.
