Half a croissant, on a plate, with a sign in front of it saying '50c'
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Red Shift Windshield

Make velocity apparent by tinting windows.
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Put a layer of LCD pixels into the front and rear windshields, and gradually turn the front windshield blue and the rear windshield red as the car approaches maximum design speed.

Bonus addition: In-dash clock that slows as car picks up speed.

Credits to [waugsqueke] and [krelnik] for correcting the physics...

Don Quixote, Sep 10 2003

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       Also change the speedometer so it reads as a percentage of C.
krelnik, Sep 10 2003
  

       According to Special Relativity, the clock already slows down the faster you go. At least, to pedestrians and fire hydrants...
DeathNinja, Sep 10 2003
  

       kinda like when the shutte re-enters the atsmophere?
dickity, Sep 10 2003
  

       This would only make sense if you're in reverse. Red shift occurs when things are moving away from you.
waugsqueke, Sep 10 2003
  

       Ah yes, so the red goes in the rear windshield. You'd need a blue shift set to go in the front windshield.
krelnik, Sep 10 2003
  

       Idea updated per [waugs] and [krelnik]...
Don Quixote, Sep 11 2003
  

       +. Could you have warp drive type stars flying along the side windows?
RobertKidney, Sep 11 2003
  

       What color does it turn when you are speeding?
k_sra, Sep 11 2003
  

       Yes, [dag], you don't do speed cuz you're high on life. ; )
k_sra, Sep 11 2003
  

       [DQ] - "rear windshield" Is this a UK thing? The way I drive (forward), only the front glass shields me from the wind. The side and rear glass are just windows.   

       As an alternative to this idea, you could "make velocity apparent" by setting up hundreds of millions of stationary objects outside the vehicle. These would seem to move relative to the vehicle with increasing speed in proportion to the vehicle's speed. This has the added advantage of already existing.
ConsultingDetective, Jan 31 2004
  
      
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