Question:  Some traffic signals in snow country with LED lamps are getting clogged with snow.  Are there any new products to address this problem? 

Answer:  The lower wattage of LED traffic signal heads compared to incandescent also means the lamps generate less heat.  This allows snow or ice to form on the head and sometimes block the display.  In at least one case in Wisconsin, it has become a legal issue.  See http://www.todaystmj4.com/news/local/79008352.html

McCain Traffic Supply has developed a new type of visor to address this problem.  Initial field tests at 30 locations in Colorado is showing promise.  See http://www.mccain-inc.com./news-events/press-releases/167-snow-scoop-visors-combat-led-traffic-signal-snow-build-up.html for more information.  




 Republic ITS' New England regional manager Chris Romeo reports that the bottom opening in the tunnel visor may be the most important piece of equipment that allows the snow or ice to flow off the signal lens.  The louver in the snow visor shown above may have the disadvantage of allowing more sun to shine directly on to the lens at certain times of day.  In other words, try out your options and see what works best for your conditions.