Motoring Discussion > The wrong kind of snow? Green Issues
Thread Author: sherlock47 Replies: 1
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New Sun 22 Mar 15 17:34 
 The wrong kind of snow? - sherlock47
asia.nikkei.com/Business/Trends/LED-traffic-lights-pose-unexpected-hazard

With all the energy that is saved, I suppose the addition of a thermostat controlled heating element is the way forward!

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New Thu 26 Mar 15 08:24 
 The wrong kind of snow? - IJWS14
Partly why signals on the railway are the other way up (red at the bottom).

Because they don't cycle in the same way as traffic lights and the red lamp may not be on for hours the lights are laid out so there is nothing below the red light for snow build up on so the red light cannot be obscured.
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