FEATURE
EURO NCAP
67


Test cases  


As Euro NCAP introduces pedestrian and child protection ratings, Thatcham has also launched dynamic whiplash testing in a bid to further improve vehicle safety. Plus: the latest EURO NCAP test results in full

“Whiplash occurs in low speed rear end shunts, traffic lights and traffic jams and is made worse by badlydesigned and poorly-adjusted head restraints”
Whiplash is the most common form of motor accident injury and there are plans afoot to include head restraint testing in the European New Car Assessment Programme. Euro NCAP (www.euroncap.com) was established in 1997 to provide comparative crash test information for vehicle buyers and fleet operators on some of the most popular cars sold in Europe – each Euro NCAP star reduces the risk of fatal or serious injury for occupants by 12%. Initially launched to provide information on occupant protection in the event of a crash, the Euro NCAP programme – the latest results for which were released last month – has been extended to include tests designed to assess pedestrian protection and last November the first child protection ratings were issued.

Now a technical sub-group is currently looking at whiplash protection but, according to Euro NCAP secretary general Adrian Hobbs, it is not yet clear what their recommendations will be or when whiplash tests will be added to the programme. Thatcham, the UK-based Motor Insurance Repair Research Centre joined the board of Euro NCAP earlier this year, and two years ago it launched its own annual rating results focusing on head restraints and their ability to prevent painful whiplash injuries. It now has data on more than 400 models.

Until this year all whiplash testing has been static, but in May the organisation introduced dynamic whiplash testing using a sled that simulates front, side and rear collisions. Whiplash occurs in low speed rear end shunts at junctions, traffic lights and traffic jams and is made worse by badly designed and poorly adjusted head restraints. In the UK there are more than 200,000 cases of whiplash a year – with 2,000 cases resulting in some form of permanent disability – costing insurers a total of £1.6 billion. The whiplash tests have resulted in many improvements in seat design, including stiffer and higher seat backs, bigger head restraints and active head restraint technology.

The latest Thatcham results, which can be viewed at www.thatcham.org, showed a 20% increase in makes and models rated “good” and a 64% reduction in those rated “poor” when compared to 2002 whiplash tests. However, Thatcham crash laboratory manager Matthew Avery says: “Although some manufacturers are on the right road it should be noted that 6% of new models tested still only rated as offering ‘poor’ and 17% ‘marginal’ protection against whiplash.”

“Many manufacturers are still failing to heed our advice and still produce unsafe seats”

Thatcham singled out the new Volkswagen Golf for praise saying: “The old model rated as ‘poor’, but the new Golf Mk5 has moved to ‘good’. As a result Thatcham predicts a possible 40% decrease in whiplash injuries for the new model.” Mr Avery added: “Many manufacturers are still failing to heed our advice and still produce unsafe seats. But, as always, the onus is on the motorists to take a few seconds to adjust their head restraint to provide optimum protection.”

He added: “The majority of injuries could be averted if drivers and their passengers took a few seconds to make a minor adjustment to their head restraints. Adjusting a head restraint to the appropriate position could save a lifetime of pain and suffering. Most people have taken on board the message that using a seat belt saves lives – now they should use their heads and save their necks.”

“Good seat and head restraint design – coupled with the motorist making the appropriate adjustment – is the key”

Mr Avery concluded: “Good seat and head restraint design – coupled with the motorist making the appropriate adjustment – is the key. By combining the two an incalculable amount of pain and suffering could be prevented.” In addition Euro NCAP has discussed testing luggage retention mechanisms several times and it remains on the agenda for future discussion. In the past Mr Hobbs said it had proved difficult adding the requirements to the tests. Future Euro NCAP tests are also likely to focus on accident avoidance technology.

Mr Hobbs added that “Euro NCAP is constantly developing,” while Guido Adriaenssens, chief executive of International Consumer Research and Testing, which represents European consumer organisations on Euro NCAP, added: “There are still areas that need to be addressed, like whiplash protection and luggage retention. It is hoped that in the near future Euro NCAP is able to incorporate these in its protocols in order to encourage car manufacturers to do better than the bare minimum that is required by the law.”

How to adjust head restraints for maximum whiplash protection

Head Restraint Use: A head restraint that is behind and close to a person’s head can reduce the risk of a whiplash injury in a rear end crash. Although most head restraints are adjustable, they are typically left in the down position and many are not capable of being adjusted high enough or close enough to the back of the occupant’s head to provide protection. Thatcham’s research has indicated that people do not adjust their head restraints correctly. In a recent study, the Centre’s researchers found that 78% of drivers failed to adjust their head restraints correctly, or were driving cars with head restraints incapable of correct adjustment. Only 22% had “good” geometry (were high enough and close enough to occupants’ heads) and, of those, 11% were fixed one-piece designs with “good” geometry, such as those from later Volvo cars.

Locking: Head restraint locking is another important element in a good design, because head restraints that lock are less likely to be pushed out of adjustment. A locking head restraint will tend to remain in place during a rear crash, whereas a well adjusted, but non-locking, head restraint can often be pushed down by the occupant’s head, negating any protection that it may have offered. Furthermore, rear seated passengers often use the front seat head restraint as a hand hold to ease getting out of the back of their car, so if the restraint fails to lock, again it may be pushed down, limiting its effectiveness.

Correct Adjustment: To offer adequate protection, a head restraint should be as high as the top of the head and as close as possible to the back of the head, touching is best. Although many drivers report initial discomfort with a head restraint so close, especially those with ponytails, it is vitally important that head restraints are positioned sufficiently close to prevent the ‘S’ shape phenomenon. A properly positioned head restraint is the necessary first step in reducing the relative motion between head and neck, thus reducing injury.

Source: Thatcham


 



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