Maybe LED Traffics Lights Weren't a Good Idea After All
Installing LED traffic lights may have sounded like a good idea when first proposed -- after all, LEDs consume 90 percent less energy than the incandescent bulbs being replaced -- but some city planners who made the switch are now wishing they could take a mulligan. Why? Apparently the bulbs just don't burn hot enough to melt snow and can become covered in a storm.
"I've never had to put up with this in the past," said Duane Kassens, a driver from West Bend who got into an accident because he couldn't see the lights. "The police officer told me the new lights weren't melting the snow. How is that safe?"
The simple answer is, it's not safe. More than just a paper problem, snow-covered traffic lights have already been blamed for dozens of accidents and at least one death. During a storm in April, 34-year-old Lisa Richter saw she had a green light and made a left turn. But a driver coming from the opposite direction didn't realize the stoplight was obscured by snow and ended up ramming into Richter's vehicle, fatally injuring her.
Several states are testing out possible solutions, including weather shields, adding heating elements, and coating lights with water-repellent substances.

Image Credit: Flickr L. Marie
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LucianaLucy
January 10, 2011 at 5:55am
ummm why don't they just leave the Green bulb as incandescent? The power savings would still be 66%, and the Green light is on the bottom of traffic lights: the warm bulb would melt at least the green light snow, and possible warm up the housing enough to keep somewhat clear the others...
And, visibility of one out of three instructions ain't bad.
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Canowyrms
December 29, 2009 at 1:52am
Heating elements? Weather Shields? Water repelling coatings? All costs money in the end, and would most likely end up being cheaper to switch back to the old bulbs. Weather shields? What happens when they get covered in snow? Derp. Water repelling coatings? Double derp, snow is FROZEN water, not a CLEAR liquid that we can already see through.
Whoever thought this through was not thinking very hard at all.
PS: My condolences to Lisa and her family.
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Caboose
December 24, 2009 at 9:02am
wow... Talk about an ass...
-= I don't want to be dead, I want to be alive! Or... a cowboy! =-
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snapple00
December 26, 2009 at 11:06am
EEEk!
Sorry. I just now read the end of the article! You are right.
My bad!!!!!!!!!!!!!!!!!!! :(
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Caboose
December 26, 2009 at 11:19am
Besides, Lisa who made a legal left turn was not at fault. The person who decided to run through an intersection without knowhing if it was safe to do so (both from a personal safety and a legal standpoint) is at fault. Male or female. Old guy or young. New driver or experienced. It doesn't matter. Not all women drivers are bad, and not all male drivers are good.
-= I don't want to be dead, I want to be alive! Or... a cowboy! =-
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snapple00
December 26, 2009 at 9:47pm
I said I'm sorry!!!
I saw an article about driving, I made a quick stupid comment.
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Tommytooker
December 20, 2009 at 11:36am
This is another example of narrow-minded people rushing to save the whales/polar-bears/earth/ozone/owls... pick one. That's a character flaw that I do not have any sympathy or patience for so get ready for my soapbox. Here's a tip for all you "public officials", "put the publics safety first and THINK it through. Now at least one person is dead, how many more are injured because somebody thought that they would feel better about themselves because they were saving energy. Don't get me wrong, I'm all for LED lights, in fact lets light up the whole world with LEDs. But will you people making these decisions think about the consequences and not how your decision will make you feel better about yourself or how you will look green in the eyes of a fanatic.
It's amazing that nobody anticipated the outcome of using low-heat bulbs outdoors in the winter time. And I'm sure there's a simple solution that will still maintain a high level of energy savings. There, that's it, I'm finished, that wasn't too bad was it?
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schneider1492
December 26, 2009 at 8:44pm
i mostly agree with you but i think it was more to save taxpayer money than do make some unnamed official feal beter about themselves. as a consequence millions will probably be spent now replacing traffic lights with ones that have a thermostat and heat element.
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Trooper_One
December 18, 2009 at 1:23pm
I don't know about you guys in the states, but here in Canada (and generally, I would imagine), is that if the light is a flashing yellow or if the lights don't work, it's equal to a 4-way stop and proceed with caution.
The driver says the lights didn't work but that's no excuse for wanton carelessness, driving without due diligence, and negligence causing death.
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To0nces
December 27, 2009 at 2:37pm
If you're driving along and not paying close attention, you might not even notice there are lights at that intersection since there wouldn't be red, yellow, or green visible. Also, night time would make this even worse.
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BaggerX
December 28, 2009 at 11:44am
This is what I was thinking. Depending on the conditions at the time, I might not even realize there was a stoplight there, or even an intersection. Of course if conditions were that bad, I think I'd be driving pretty slow too.
I'm thinking that adding heating elements may impact the energy savings, but then they'd probably only need to be turned on a few times a year, so maybe it is still a good deal, aside from the cost of installing the elements.
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schneider1492
December 26, 2009 at 8:48pm
Come on, people in general are stupid. They have to put a label on a blow-dryer that says do not us in shower!
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nekollx
December 29, 2009 at 11:36am
or giant black and white signs for "do not BLOCK interection" with BLOCK in big bold letters...that are still ignored...
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arosadler
December 22, 2009 at 8:19pm
You funny Canadians and your "common sense" approach to life. This is America. We have to be told in no uncertain terms what to do or we can't figure it out. Our coffee must be labeled HOT or we burn ourselves. Wanton carelessness is just a good excuse for a lawsuit. It's better than hitting the lotto.
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Jono
December 18, 2009 at 3:42am
Couldn't they just lace the glass with defrosting wires like we would see on the back window of a car?? I mean 90% is a lot of energy to be saving so I wouldn't abandon LEDs altogether. Just have the defrosters either sense stormy weather and turn on or turn them on during winter months and off for the summer. Shouldn't be all that difficult.
Say its too expensive to put wires in... and just wastes as much energy as traditional bulbs; I am sure placing a hood over the light and having concave glass extend from the light would resolve the problem. One thing to note that I've seen on lights with weather borders around the lights is that they go completely around the light... In the case of snow it could pile up on the inside of the cover. The cover needs to only shield the top portion of the entire light and the sides. The glass that covers the LEDs should have a slight, unexaggerated concave shaped outwards so it lets snow naturally fall away from the surface, if any manages to get past the weather covers, which would happen with the introduction of any wind.
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Tekzel
December 18, 2009 at 7:16pm
Uh, you sure you don't mean convex?
But yea, I am sure they can find a good way to solve the problem without reverting to wasteful incandescent bulbs.
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Caboose
December 18, 2009 at 8:04pm
Ya, because conCAVE... it's like, a cave. And conVEX, it's like a.... Vex.... </Bill Nye The Science Guy>
-= I don't want to be dead, I want to be alive! Or... a cowboy! =-
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NeauxFear
December 17, 2009 at 11:41pm
Y'all don't have guards over the lights, or are they just not effective against snow? Because I know here in Louisiana we have guards over each light, but it's mainly to block out the sun. Being as we get snow about 2 or 3 times a decade, I really don't know how well they would work.
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schneider1492
December 26, 2009 at 8:54pm
We use a tube shaped gard in northern California and southern Oregon, i see that the tube might fill with snow if it was windy. Maybe half tube gards would be more suitable.
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nsk chaos
December 17, 2009 at 3:07pm
the only thing that might work is probably adding some heating elements...but that might be costly....but we still wont know if it will work or not or in the long will the investment pay off?
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squarebab
December 17, 2009 at 4:59pm
But only because they have to replace the existing lights with ones that have heating elements. Thermostatically controlled elements on glass have been around for ages, and the morons who designed, purchased, and approved those lights for use up north should all be FIRED!
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nsvander
December 17, 2009 at 12:36pm
I find it funny that this is just now being seen as a problem, I dont know about other states, but in Southen Cali. they have been using LED traffic lights for what seems a better part of 4 or 5 years. They are just now realizing that they don't get hot and melt snow? I have to agree with the rest though, blame the drivers for not paying attention to lights. Cannot see what color it is, come to stop and look before you go!!!
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nekollx
December 17, 2009 at 3:58pm
Depends on where in Socal you live...we do have ski resorts....
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winmaster
December 17, 2009 at 4:42pm
You get what? Maybe 2 inches a year. Cone to Wisconsin. The LED lights are completely covered, you can't see them at all.
Personally, they should just go back to the old lights. The extra energy they used was being thrown off as heat-heat that we needed.
--------------------------------------------------------------------------------------------------
The quick brown fox jumps over the lazy dog.
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talz13
December 29, 2009 at 7:55am
I live in northeast ohio, and we've had LED traffic lights for years. Never had a problem with them. And yes, we do get snow here.
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nekollx
December 17, 2009 at 4:47pm
next time look before you leap
http://www.google.com/search?q=snow+rates+in+california&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a
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Five teenagers, one alien ghost, a robot, and the fate of the world.
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DogPatch1149
December 17, 2009 at 12:32pm
With all that money saved by using less power and not having to change the lights as often, they can spend it on adding heaters, shields, coatings, or some other solution to keep them from getting covered.
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kw13tl33tg33k
December 17, 2009 at 10:55am
the problem is not the lights. its the drivers
I stay in cleveland and it doesnt matter if its snowing or not if those power lights are broken rather LED or traditional buffoons here treat them as "No Light" meaning they jus done stop...as an ex 911 dispatcher we took hundreds of calls like this. Of course the law is when the light has malfunctioned please treat as a 4 wa stop...but that Never Happens.
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Scootiep
December 17, 2009 at 12:06pm
Gotta agree with you, it seems like most people are too stupid to actually learn traffic laws these days. Yes if the lights are becomming covered with snow/ice it's a problem that needs to be solved. But this didn't cause the accidents, the morons behind the wheels did.
To start press any key...ohh, where's the "Any" key. - Homer Simpson
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nekollx
December 17, 2009 at 12:11pm
the stories i could tell abour morons her in socal....
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Five teenagers, one alien ghost, a robot, and the fate of the world.
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nekollx
December 18, 2009 at 9:42am
SoCal
Sothern
Californa
it is the offical acronym
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rockntrumpet
December 23, 2009 at 4:09pm
Allow me to impart some of my Northern book learning. CalifornIa (it has an 'I'). SoUthern (it has a 'U'). OfficIal (it has an 'I'). Next time try learning how to spell from somewhere other than Anime subtitles. That is all.
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BaggerX
December 28, 2009 at 11:51am
It's a widely used and understood abbreviation. What's the problem? I've never lived there, but I know what it means. If it's not official, it might as well be.
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mikeart03a
December 25, 2009 at 12:47pm
I don't know what the issue is here... Why are you arguing over a little abbreviation? I'm a Canuck and even I knew what SoCal meant...
- mike_art03a
Owner, Network Admin
Michael Artelle Online Solutions
http://www.michaelartelleonline.com
michael.paiement@sympatico.ca
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Keith E. Whisman
December 29, 2009 at 2:21pm
socal, isnt that some sort of a weight loss energy drink
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Edwincnelson
December 17, 2009 at 10:43am
What all these stories have failed account for is how many people die in accidents because the lights have burned out. LED lights work for as long as 10 years. Incandescent bulbs only last one year. I think you may find that LEDs are actually saving hundreds of lives by working without maintenance for so long.
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Tommytooker
December 20, 2009 at 11:13am
Using your logic, the more accurate comparison would be how often do incandescent traffic lights burn out during snow storms.
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r7mr7m
December 17, 2009 at 11:06am
If only they would install higher quality LED lights. It might not be a safety issue yet but in L.A. and Ventura counties (CA), LED stoplights are all over the place. One problem is that a surprising majority of them have at least a quarter of their LEDs burned out. It's too bad that they can't get these LEDs to last a month, let alone 10 years.
Also, most intersections here have multiple sets of lights for each direction. Redundancy. If the power fails they have the battery backup to start the red flashes and when that fails, the cops setup the sandwich board stop signs in the intersection or direct traffic themselves.
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COMMANDER_COOK
December 17, 2009 at 1:31pm
The LEDs aren't burning out. It's water leaking into the housing which corrodes the terminals.
A temp controlled heater would be easy to install in those things.
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r7mr7m
December 18, 2009 at 8:48pm
I would agree with you if it actually rained more than once or twice a year in L.A.
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schneider1492
December 26, 2009 at 9:05pm
A small inferred bulb at the center would only use about 50w, should be able to melt the snow, and can be controlled by a thermal sensor.
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Budman_NC
December 17, 2009 at 10:18am
What idiot goes through a traffic light not knowing what color its indicating?? Those in the wrong should have to retake their drivers liscence test. People should drive as if their life (and other's) depends on it because it does! I almost lost my life 4 years ago because of this kind of (non) thinking. Sorry, but if you've ever had a 3500 pound SUV shoved up your butt due to someone's carelessness, you kind of get "testy" over this kind of thing.
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LatiosXT
December 17, 2009 at 9:23am
I think it states in the driving manual in California that if lights are disabled (by power outtage), you are to treat them like stop signs. I would think if you couldn't really see a traffic light, you'd treat it like a stop sign.
Oh well. What can you do?
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HeartBurnKid
December 17, 2009 at 10:44am
Because of the way wind can affect snow, it's entirely possible for the light in 1 direction to be blocked, but in another to not be. So you can have somebody treating the light as a 4-way stop sign, while somebody else coming from the other direction has a green light clear as day. BLAM.
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r7mr7m
December 17, 2009 at 10:57am
I understand your point here but the person treating it as a stop sign should not assume that the person seeing the green is going to stop, especially in a situation where there is an issue of inclement weather.














