| 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 |
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| “Whiplash occurs in low speed
rear end shunts, traffic lights and traffic jams and is
made worse by badlydesigned and poorly-adjusted head restraints” |
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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.”
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| “Many manufacturers are still
failing to heed our advice and still produce unsafe seats”
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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.”
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| “Good seat and head restraint
design – coupled with the motorist making the appropriate
adjustment – is the key” |
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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.”
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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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