On Sat, 11 May 2013 19:00:09 +0200, Wolfgang Strobl
<
ne...@mystrobl.de> wrote:
>Sir Ridesalot <
i_am_cyc...@yahoo.ca>:
>
>>On Saturday, May 11, 2013 6:50:36 AM UTC-4, Helmut Springer wrote:
>>> sms <
scharf...@geemail.com> wrote:
>
>Well, no. _I_ wrote the following sentence.
>
>>> >> Strobes are illegal here in Germany and AFAIK in most of Europe
>>> >> on civil vehicles, and rightly so.
>[...]
>
>>> No, really not, believe me. It makes a difference how many vehicles
>>> you have on the streets, so you probably can't compare the US to
>>> crowded Germany.
>
>Perhaps. But I can compare to the crowded parts of Germany to some of
>the much less crowded rural parts of France and Italy. Stroboscopic
>lights are useless and distracting over there, too.
>
>The reasons are somewhat different, but the results are similar. In
>rural areas, whithout noise, a standard taillight like this one
><
http://www.bumm.de/produkte/dynamo-ruecklicht/d-toplight-xs.html> is
>visible and recognizable as a vehicle taillight at a distance of almost
>two kilometers.
>
>Even if a stroboscopic light where able to extend this distance (it
>isn't), that's unnecessary, there is no need for that. On the other
>hand, it gives less positional and directional information in the near.
>And it may be worse, see below.
>
>I'd prefer an fast overtaking driver on a rural road to judge my
>position on precisely, thank you very much!
>
>
>>I started using front and rear flashing lights because the steady
>>on lights are the ones that get lost in the morass of other brighter
>> lights. The flashing catches the eye.
>
>Well, no. It doesn't, because in that morass of flashing lights drivers
>have learned to cut out and mask all that optical information overload
>and concentrate on the relevant part: moving steady lights on the part
>of the road they are driving on. They might see your blinking xmas tree,
>but won't _recognize_ it as a vehicle.
>
>
>>I asked a number of police officers about my flasking lights
>>(strobe in front & simply flashing rear*)- are they too bright
>>and are they distracting to drivers. The replies from every
>>one of the officers was that they wish more bicyclists would
>>use them because it makes them so conspicuous.
>
>May I ask wether these are the same experts who often suggest or enforce
>bicycling on the sidewalk?
>
>In my experience, police offices share most misconceptions of the
>general public about bicycling. This is even true here in Germany,
>where we have a lot more vehicular cycling than the U.S. In addition,
>these people rarely are experts for visual perception and perceptual
>psychology. They are experts in law enforcement, not researchers.
>
>Google for "motion-induced blindnes", read the wikipedia article and
>look at some of the examples to learn about some of the effects to
>avoid. While the whole field is quite complex, one conclusion seems to
>be obvious, this isn't something to experiment with in traffice. Far too
>many of these effects are of the kind "it's in view all the time, but
>becomes invisible nevertheless".
>
>A quote from
>
><
http://www.nature.com/news/2001/010614/full/news010614-9.html>
>
>"The researchers speculate that this phenomenon could happen in everyday
>life without us noticing it. A highway at night, with drivers staring
>dully at a mass of moving lights, might recreate the kind of conditions
>used in the experiments, says Bonneh, causing objects - the tail lamp of
>the car in the next lane, for example - to temporarily vanish."
After reading your comprehensive post I am appalled that nearly every
"warning light" I've seen used in and around highways are flashing
lights - the slow moving garbage truck has flashing amber lights, the
school busses use flashing amber front and rear when they stop to let
the kids out, the battery operated warning lights at a highway
construction sites are flashing, the big red over heat warning lights
at a particularly dangerous curve near where I stay are flashing red,
Goodness, even the warning lights on my Honda flash. Even the turn
signals on the car flash.
--
Cheers,
John B.