Are there Reasonably Cheap Sensors Which Could Detect Icy Roads?

[crowmanyclouds]

@Hilarity_N.Suze

{…} He said…actually, he drawled, “Hasn’t anybody ever told you that an overpass is a lot more likely to have ice on it? On account of the wind currents underneath.”

Well, I knew that wind chill made it feel colder, but this was the first I’d heard that wind made it actually, factually colder. But obviously I’ve remembered that ever since.
{…}

Not “wind chill”, and he’s only sorta right, wind helps the road reach, and stay at, the air temperature faster than on a windless day,

@Una_Persson

Because the road is protected in part by the Earth below it, and a bridge is chilled by the air passing over it on both the top and the bottom of the surface.

@Philster

Because the bridge does not benefit from any geothermal heating…in addition to the air circulating above and around it.

CMC fnord!