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A comment on Istanbul Isiklarius traffic lights. Parent comment

Re:Istanbul Isiklarius traffic lights by ars on Monday August 08, 2011 @04:50AM (#2859301)
Don't forget you need some kind of snow sensor - or at least a temperature sensor.

Or some kind of centralized switch.

Totally doable of course, but it does make them more complicated, more expensive and less reliable.

You would need to calculate the tradeofs. It's not automatic either way.

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Re:Istanbul Isiklarius traffic lights by Cushman on Monday August 08, 2011 @05:20AM (#2859353)
A traffic light is already half of a snow sensor by virtue of being a light. If it's covered with snow, the snow will reflect light back. Add a few photoresistors and you're in business. It'd be the cheapest part of the whole project.
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