It's a cone shaped lens for LED traffic lights. The device was invented by ... they quickly become caked with snow and ice and drivers can't see the signals and can't tell if they should stop ...

Lincoln’s been using LED traffic lights for more than 15 years ... signal electrician came up with some kind of cone contraption that keeps snow from building up on the signal lights, patented ...

It's a cone shaped modification for LED lights with a channel at the ... hooded scoop visors, but snow and ice still clung to the traffic signals, creating a hazardous situation.