Energy-Saving Stoplights Blamed In Crashes

The AP reports Energy-saving stoplights blamed in crashes.

"Cities around the country that have installed energy-efficient traffic lights are discovering a hazardous downside: The bulbs don't burn hot enough to melt snow and can become crusted over in a storm — a problem blamed for dozens of accidents and at least one death."

"Many communities have switched to LED bulbs in their traffic lights because they use 90 percent less energy than the old incandescent variety, last far longer and save money. Their great advantage is also their drawback: They do not waste energy by producing heat. Authorities in several states are testing possible solutions, including installing weather shields, adding heating elements like those used in airport runway lights, or coating the lights with water-repellent substances."

Weather shields? Don't all traffic lights have hoods above them to prevent glare?

"In Minnesota, authorities are more than halfway to their goal of upgrading the state's 1,300 or so traffic lights to LEDs. The Transportation Department occasionally gets reports of an obstructed light, but often by the time a highway crew arrives, the wind has knocked out the snow and ice, said traffic systems specialist Jerry Kotzenmacher. Minnesota is experimenting with weather shields."

The entire state of Minnesota has only 1300 traffic lights?!?!