By now, you should know that every technological advancement comes with a major downside. The assembly line brought cheap motorized transport to the masses, but pumped countless tons of atmosphere-destroying pollutants into the sky. While lithium-ion batteries gave our cell phones and laptops the ability to last all day, they have an unsettling tendency to burst into flames when you least expect it. Not surprisingly then, LED traffic lights have their own potentially deadly pitfall.
LED Traffic Lights Save Energy, But Disappear In Snow