France's Eurovia is developing a thermosensitive road varnish that changes colour to indicate freezing and dangerous conditions. Colour changing boxes - hmm, I think I've seen this somewhere in before on a geeky t-shirt - Hypercolor.
As the temperature changes to subzero or other way round, the road could turn to any other indicative color as pre-designed. Several roadways in France are currently being used for durability and usability tests. I look forward to more lively roads in near future. When i say "lively", it could be vividly blinking colours "lively".
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