When temperatures drop, it can be tricky to judge road conditions accurately. Soon, however, some roads could give drivers clear icy warnings by turning themselves pink.
A new temperature-sensitive varnish developed by researchers at French company Eurovia can be applied to road surfaces to warn drivers about dangerous conditions. The technique – still at the testing stage – might help prevent ice-related traffic accidents in future, the researchers say.
The varnish is made of a polymer containing a thermochromic pigment. The same type of coating is already used to make bath thermometers and frozen food packaging that responds to temperature change. However, it is the first time such a coating has been used to monitor road temperatures.Link
"So, instead of the yellow brick road, it'll be the pink asphalt road?"