Where's the solution for LED traffic signals that can't melt snow?

We know from last week's storm that freezing rain, snow and high winds are a recipe for an epic fail with usually dependable LED traffic signals. There's no shortage of ideas to fix the flaw in LEDs but no magic bullet yet, local and national experts say. LEDs generate much less heat than old-fashioned incandescent bulbs, which melt ice and snow. "The issue of snow on LED signal heads is something that municipalities have been concerned with for years," Lake County Traffic Engineer Jonathan Nelson said.