On 10/06/2019 18:15, Kerr-Mudd,John wrote:
On Mon, 10 Jun 2019 15:32:24 GMT, TMS320 wrote:

On 10/06/2019 15:22, JNugent wrote:
On 10/06/2019 15:18, TMS320 wrote:
On 10/06/2019 00:38, JNugent wrote:
On 09/06/2019 13:15, Simon Jester wrote:

https://www.youtube.com/watch?v=LRpeOuBk5yQ

If they had been wearing cycle helmets they would have been seen.
Worst case the cycle helmet force field would have prevented the
crash.

You seem to be misremembering the assertions made by those opposing
the compulsory *and* voluntary use of cycle helmets (the latter on
the basis that they did not want such use to be more widely
accepted).

Assertions made were that the cyclist was at less risk of head
injuries in a collision if not wearing a cycle helmet (as
counter-intuitive as that may be). The mechanics of this were never
fully explained (pace a reference to "rotational forces" and
another to the thickness of the helmet structure), leaving those of
us who are not immediately familiar with such items to the sole
logical conclusion that the cyclist without a helmet would manage
to keep his head the crucial couple of centimetres away from
collision with the asphalt or street furniture, with a force-field
indeed being the only means of protection.

Simple mechanics provides the explanation - for those with a
comprehension of simple mechanics. For those that don't, it might as
well be a force field.

So you are right and all the professional advice is wrong?

What professionals?

Asking for a friend.

Obviously.

A proper response:
https://www.cyclehelmets.org/1100.html
(slightly dated; but data trumps anecdote)

Thank you for that.

QUOTE:
Data for the year 2002/3
Hospital admissions for head injury:

All causes: 30,533
Cyclists: 2,183
Cycling represents 7.1% of all head injuries

Proportion of all injuries that involve head injury:

All causes: 34.2%
Cyclists: 37.6%
Pedestrians: 43.7%

Serious head injuries:

All causes: 5,875
Cyclists: 385 - 550 *
Pedestrians: 4,564
Cycling represents 6.5% of all serious head injuries
ENDQUOTE

I'm not quite sure of how all those figures hang together (eg, cycling
head injuries are 7.1% of all head injuries but 37.6% of all injuries
which involve head injury). Perhaps there's a statistical distinction
between hospital admissions and out-patient treatment and perhaps
there's a further distinction in counting as between pure head injuries
and head injuries accompanied by other injuries in the same incident
(the latter of which seems the more likely when one considers that most
people will attempt to protect themselves in one way or another).

But either way, I still, instinctively, find myself in opposition to the
compulsory use of cycling safety helmets by adult cyclists.