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If you used Urea instead of salt, and used high pressure air to disperse it, this would work. Urea is used on many airports these days because it's non-corrosive. |
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Urea is also negative for the environment because of nitrogen runoff, and acetate-based de-icers are being introduced. |
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Just don't walk underneath when they're spraying. |
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I was thinking of them primarily for motorways and other fairly pededstrian free areas. A clear plastic dome could be mounted umbrella-like on each pole to protect passing foot traffic. |
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one council today sent out the road sweeping van instead of the gritter, the little brushes smoothed off the ice really well making a complete ice rink of the road. |
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No, just a passive infra-red detector that disarms the spray when a pedestrian or vehicle is nearby. Since the system only comes into play when temperatures are low, targets are likely to be substantially hotter than the local background and hence very easy to spot. |
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