The gap and the relative height of the headrest behind drivers was determined for 1915 vehicles approaching an intersection on a two lane road. Vehicle type and headrest adjustment were also evaluated using a film of normal driving. Only 10% of drivers had headrests in the most favourable position to prevent neck extension during a rear end crash. 73% of cars had adjustable headrests, but only a quarter were placed in the up position. 83% of the adjustable headrests could have been raised to better protect the driver. Hyge sled tests were run to determine biomechanical responses for the various conditions observed in normal driving. This included three headrest heights and three gaps behind the head. Public education behind the head. Public education and vehicle design should address the importance of proper headrest placement for driving safety.
Samenvatting