A new sensor could help municipalities save big bucks because it can tell snowplow operators how much salt they're putting on icy roads.
Engineers at Carlos III University in Madrid, Spain, said salt can be wasted because too much is spread on roads to melt the ice, which impacts a community's budget.
As well, the salt causes damage to cars, infrastructure and the surrounding environment.
The researchers developed an optical sensor that can tell in real time how much salt is on a road's surface. It does so by recognizing the luminescent properties of the sodium chloride.
The research appears in the journal Sensors and Actuators B.