Graeme said:Richard Corfield <[email hidden]> wrote in
news:[email hidden]:
Quoted message said:Alternately, there's always the Heads Up Display idea, which would be
suitably funkey, but presumably either too expensive or considered
unsafe.
Don't know for certain about the safety aspect, but I would have thought it
wouldn't be too bad depending on how much (if at all) you had to change
your focus. I remember seeing a night vision HUD on a Mercedes (I think) on
TV some years back. They said it was set to act as if it was eight feet
away as that was the natural distance that drivers eyes focussed on. I
found that pretty scarey! Apparently this is also the distance that fighter
plane HUDs use (according to my dad, who used to design them) so maybe it
isn't too worrying after all. :-/
You could easily make a super-cheapo one if you had an adequately bright
display to reflect off the windscreen/reflective glass. All you'd need to
do is flip the displayed image to allow for its reflection. I remember
reading an electronics magazine as a kid that had an LED speedo that was
meant to be used in HUD mode, reflecting off the windscreen.
Graeme
I've had a few instances that've highlighted this 'common focussing
distance' in the last week, and I've been mulling this over, so was
intrigued to hear you post about the fighter plane HUDs.
As a cyclist, I'm used to not registering on driver's radar till really
quite close, and this can be very worry-inducing. However, until this
last week, I hadn't noticed similar things going on when driving.
But...
Several times at a narrowing in the road, drivers have apparently failed
to spot me (in a car) until I am probably about 12-15 feet away. I can
tell this, because if they leave their car where it is on the road,
we'll collide. If they pull over to the kerb instead of following the
centre line (and in some cases overhanging it) which is the natural line
for the turn-right lane at the traffic lights they are coming up to,
then we can pass safely.
I'm approaching, up hill, having moved out to pass parked cars (in
marked bays, on my side of the road). They are coming down hill, toward
the traffic lights, toward (but not yet entering) the section where
there are two narrow lanes.
The road is such that to negotiate the parked cars (nose to tail) once
you've entered that part of the road, you have to keep going, since
oncoming traffic down the hill toward the lights will not have the space
to pass unless they are close to the kerb.
So, I'm passing the cars, nearly at the end of it, and an oncoming car
heads towards this constriction. Do they show any signs of slowing,
moving over? No, they're focussed entirely on moving to the middle of
the road in anticipation of their right-turn lane that's still ahead of
them and behind me at this point.
It's not till I'm starting to brake and wondering if I need to start
making myself more obvious, and there's 15, maybe 12 foot, sometimes
less, between us that they finally *see* me, and make a dive toward
where they *should* be, which is midway between kerb and white line,
instead of hugging the white line....
It really does make me wonder about a lot of driver's eyesight, or just
plain lack of attention-paying.
Given this effect is exacerbated if you're riding a bike, and they react
only once they're within 6 feet of your back wheel, I'm convinced it's
done on a perception of danger thing - another car's not so large as a
lorry, for example, while a cyclist's so small and insignificant....
--
Velvet