Half a croissant, on a plate, with a sign in front of it saying '50c'
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Hazard Warning Lights ++

Differentiate them from standard indicators.
  (+22, -1)(+22, -1)(+22, -1)
(+22, -1)
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against]

As hazard warning lights are used to warn of a hazard, I feel they should flash at, say, twice the regular frequency of a standard indicator. It's not unusual to be able to see only one side of the car and this would facilitate differentiating between indicating and a genuine hazard.

Some cars' indicators flash faster when a bulb has gone, but bulbs blowing is rare.

paraffin power, Nov 02 2004

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       Fast flashing can also indicate a flasher that is nearly worn out, which is also rare.
swamilad, Nov 02 2004
  

       Yes. Yes. Yes. For exactly the reason you state. The number of times I have slowed to let someone out into the traffic, only to find they have their hazards on and I can't see the other light.   

       Maybe a double flash followed by a normal time interval? Everything else seems to be computer controlled these days, why not indicators?
egbert, Nov 02 2004
  

       Yes. And <rant> how about "I know I'm parked on double yellows on a blind bend, but I've switched these flashing lights on so it's OK" lights too? This could take the form of a big flashing arrow saying "book me, I'm a fool."</rant>   

       Croissant.
david_scothern, Nov 02 2004
  

       [ds] Some people treat them as a cloaking device.
paraffin power, Nov 02 2004
  

       Much needed. +
Shz, Nov 02 2004
  

       Sigh. I've meant to post this idea for ages, only to find it's already there. Bun [+]
TheLightsAreOnBut, Jul 16 2007
  

       Why not use Morse code to spell the reason for the stop?
AbsintheWithoutLeave, Jul 16 2007
  

       "I'm very sorry, sir. I was too busy deciphering the Morse warning to notice that the traffic had stopped, and I ran into your car. You'll be pleased to know that the traffic was stopped because of a broken-down lorry, though... I just need to go and code my own hazard lights now. Can you remember the Morse for c?"
TheLightsAreOnBut, Jul 16 2007
  

       [d_s] - I was told by a pleeceman that using your hazard lights while parking on the double yellow is a driving offence and gets you points on your license, whereas just parking on the double yellow is a parking offence and will only get you a fine.
wagster, Jul 16 2007
  

       Is it only obvious to me that it should transmit the SOS code? +++---+++
Custardguts, Aug 18 2010
  

       what [Cg] said... well not really unless there was an in-car emergency, but have the turn signals flash in between the 4-ways.
FlyingToaster, Aug 18 2010
  

       Related idea, put the hazards on a separate battery backup, so that if your car dies due to an electrical problem, they still work.   

       But I agree, flash speed isn't the best, since that already varies between cars, but a double flash or something would be distinctive.
MechE, Aug 18 2010
  

       //it should transmit the SOS code//   

       No it shouldn't. There are many valid reasons for declaring your vehicle a hazard, not all of them requiring emergency assistance.
Tulaine, Aug 18 2010
  
      
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