[rescue] SGI Challenge L systems available in Denver

Francisco Javier Mesa-Martinez lefa at ucsc.edu
Sun Sep 26 15:54:44 CDT 2004

On Sun, 26 Sep 2004 16:34:13 -0400
  Phil Stracchino <alaric at caerllewys.net> wrote:
> On Sun, Sep 26, 2004 at 01:13:53PM -0700, Francisco 
>Javier Mesa-Martinez wrote:
>> I believe some countries like France used to have 
>> mandatory yellow lights for the low beam in the 
>> headlights. So basically you always drive with your fog 
>> lights. A lot of EU contries also mandate that night 
>> head lighting on roads to be yellow.
> Which is stupid, because however cheap it may be, that 
>flat yellow
> sodium light hides colors and does horrible things for 
> visibility.  And that in turn affects your distance 
>perception.  (Why
> the latter, I don't know offhand, but apparently it 
>does: humans judge 
> distance poorly in monochromatic light.)

I don't know the specifics of the reason for such 
policies, as that is not my area of expertise. But used to 
be very easy to distingish french drivers by the color of 
their headlights.

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