Instructables
Picture of Trigger GREEN Traffic Lights
if you or someone you know, owns a motorcycle, a scooter or even a small car, you've probably noticed that it's easy to get stuck at traffic lights. Well, I'm going to explain why it happens and show you a great little trick that will save time, gas and frustration by getting you a green light every time.


 
Remove these adsRemove these ads by Signing Up

Step 1: The Problem...

Picture of The Problem...
At most traffic lights and turn signals, you will notice a loop of wire buried in the pavement of the road near the stop line. This is called an Inductive-loop traffic detector that operates by sensing a change in frequency to the electromagnetic field over the coil of wire. In other words, when a car pulls up, it senses the vehicle and the light changes. Most motorcycles, scooters, bicycles and small cars don't have enough conductive material to trigger these loops and change the traffic light.

Step 2: The Solution...

Picture of The Solution...
Produce a very powerful field that increases the inductance in these traffic sensors, and causes the light to change! Here's how to do it...

Step 3: What you need!

Picture of What you need!
2 Neodymium magnets. I chose two from CMS Magnetics that have a pulling force of over 6lbs each. I also bought a roll of heavy duty exterior mounting tape.

Step 4: Attach it...

Picture of Attach it...
After cutting off a small strip of tape, I attached it the magnets. Then I applied it to the bottom of our test scooter, perpendicular to the road.

Step 5: Optional step & Video

Picture of Optional step & Video
Because magnets rust, I put them stacked together inside a waterproof, rust-proof, pill holder or Bison Tube and then stuck this to the bottom of the scooter. Should last a long, long time! Now here is the video!



You can learn more about how this works Here

1-40 of 404Next »
myr110 days ago

This actually does work, I would just recommend a larger Neo magnet. They are pretty cheap on ebay now days.

★★ Signature: ™Remote Controlled 007 License Plate Hide Gadget™★★

.

pcooper21 month ago

This trick from Kipkay on YouTube DOES NOT WORK. I proved it by securing a powerful rare-earth magnet from a disk drive to the end of a 8-foot piece of PVC pipe and waving it over the inductive detection loop at an intersection with infrequent traffic. Nothing happened. The only thing that triggers the light to change is a large, ferrous object, like an automobile.

hello_38247 months ago

wow

In Wisconsin this is no longer a problem, as in 2010 we got a new law that allows bikes to wait and proceed through the red if traffic allows. I used to report all the lights that did not work, but now I don't bother. I just ride through.
Does the rule apply to my SMART car or scooters? If so, maybe we'll move to WI.
Sometimes we just get kind'a P.O'd and run the dang thing. Anytime the authorities stop you - whether you're handcuffed and put in the back of the police car or not, it's considered an "arrest." So I feel the light has arrested me without cause. Never tested this in a court, but that's my story and I'm stickin' to it. ;)
Just to Bicycles, scooters, motorcycles, and other similar traffic. A solution is to wait at least 1 minute, and then go if you are clear. Problem with "45 second" laws is that if the roadway is really busy, it does not matter; you still cannot get across a flowing river of steel.
I've been treating signals with unresponsive road sensors as four-way stops for decades, even without the benefit of such a law. If I hadn't, I'd have died of thirst and starvation while waiting for the light to change ages ago!
awesome i let a car get in front of me lol
We have that here, too. But sadly, it doesn't apply much for heavy traffic when you have a line of cars behind you getting madder with each missed cycle and no opening to go. This is a helpful fix.
You have a very good point.

Another way to fix this situation is to become proactive; the inductive coils in the road will not trigger if they are out of adjustment. I have reported these for years and years, and I have also seen them become so bad that a pickup truck will not work. The state supervisor is on my email list, and he will send out a crew if someone complains. They do not have time or manpower to continually inspect each light.
I will try this magnetic solution at a place that I know does not work.

Also, if you are on a bicycle or moped, do not hug the curb. You will get old waiting for the change. Ride over the lines slowly, and position yourself directly on top of the transverse wire. If it is still working, you will trip it.

Happy riding.
cathys4 years ago
First thing...if you have a scooter you should ride on the side of the road with bicycles instead of putt putting along where people in cars, trucks and motorcycles travel. Second thing...if you took a motorcycle course or did some research you would find out that the lines underground can sense metal. So, if you are on a little scooter or even a motorcycle there is not enough metal for it it sense that's why you will see a motorcycle at a line moving their bike back and forth over the line and Third thing....really? really? You can't wait one minute for a light? dah
Yes..scooters are entitled to ride on the road just like any other road legal motorized vehicle...and most of them are able to keep up with traffic however scooters are not meant for highways where the speed limit is 65Mph or 100Kmph (not 100% on the conversion) and yes...I own a motorcycle and it's only a small one a 250 Suzuki..and at most intersections i'm able to trigger the light...but there's very rare times when I have to move my bike around to trigger them
My 400cc Yamaha "scooter" may not beat your bike off the line, but I'll pass you up on those long, desert straight-aways and wonder if you could keep up...
Maybe. Have fun battling the wind though. and I"ll pass you again when you run out of gas.

P.S.Scooters aren't meant for long distance. Motorcycles are.

P.P.S. you really suck at trolling.
I get 50+ mph even at top speed, so that puts me filling up at about every 200 miles. Yeah, scooters aren't "meant" for long distance - either are 250cc bikes, but that doesn't mean you can't have a great, fun ride. You're right about the wind - it was a b*tch comin' back when the headwind changed from coming from the right to the left, but with 30,000 miles on the bike I managed it without incident.
"Trolling?" Not exactly sure what that means - I was just looking for a way, or a device, to help the dang intersection loops realize I'm sittin' here waiting for the light to change in my favor. People say "magnets" but others say that doesn't work. Somebody should come up with a device that'd insure bikes and small cars get noticed by the technology. They'd make a bundle. Our SUV - no problem... our SMART, often gets ignored by the inductive loop.
I just get p*ssed when scooters get dissed and told to stay on the "side of the road." We haul azz - and run with the best of 'em. My son-in-law's 650cc is no match for my scoot.
pbleier cathys1 year ago
My scooter does over a hundred mph with two people on board - don't ask me how I know this is fact, but on a ride from LA to Laughlin if you don't do at least 90, the big trucks will ride up behind you and blow you off the road. It's 400cc strapped to (mostly) a bunch of plastic, so I'm looking for a device to help trigger the lights. Same problem with our SMART car - it's got a plastic skin. (Don't hate me 'cause I'm getting two or three times your mileage...)
First thing... It probably depends on where and what state/country,but where I come from, scooters should keep to the road.
Second thing... If you did more research you would find that those inductive-loops have a problem detecting anything else but cars.
But as someone working with these things, I'm going to say this: This is not something you should have to handle. There is a simple solution to this problem, and that's a thinner, diagonal loop across the street. These diagonal loops, or "wings" as we call them, can even detect bicycles, and are used to detect just that.
snuzzle cathys2 years ago
First, yes a bicycle or slow scooter should be on the side of the road... unless there is a right-turn lane, in which case he or she should be in the through lane so as not to get right-hooked by a car making a right turn :) I'm not going to get right-hooked. If I'm going straight, I'm in the through lane. If I'm turning left, I'm biking to the left. You know? Common sense here.

Thirdly, it's not a matter of waiting... some lights do not change at all unless they detect a vehicle. The magnets allow them to detect that a bike or small scooter is there so they know they need to change.
cowen cathys4 years ago
One of my customers has a 80 model Harley and had the magnet idea professionally installed some years ago because of the loops not picking up very well. The loops are burried in cement so the only way to FIX them is to dig up the payvement. The only way to check them for PROPER operation is to trigger them. If the cement shifts in the heat and cold that can break the loop and thus you need something to help trigger them. The Loop starts most lights counters that change them to green it is not a Green light EMS device that makes your side change and everyone else RED. I work on LOOPS at the drive thru and sometimes we have to cut them out and replace them or fix the junctions that connect to the inside equipment.
anjin12 cathys4 years ago
Cathys --- First things first. Scooters ARE entitled to be on the road, they are a "motorized" vehicle, and, as such, shall NOT travel in the bicycle lane if marked. Second, most states and provinces require that "bicycles" travel "As far to the right as practicable", not as far as possible and recommend that a path 1 metre or 3 feet be maintained from the edge of the road. .... Now ... for the rest of your comment ... Most bicycles have enough ferrous material in the crank set (pedals) to activate the sensors embedded in the road. The bicycle must be on the outside edge of the circle to "change" the current to activate the lights. For more information see ... http://www.humantransport.org/bicycledriving/library/signals/detection.htm ... Thanks and have a good day
cathys anjin124 years ago
putt putt
eskate1 year ago
stronger the magnet the more possibilities to change to green?
rmelchiori4 years ago
I think that the idea the author is talking about has been misunderstood. The problem isn't trying to get a red light to turn green so he doesn't have to wait. Many intersections have sensors at them so that the light never changes unless it senses a vehicle. This is done to promote better traffic flow. Same thing for left turn lanes. I know that this technique works. There is actually a product sold to do this. Nothing more than a magnet mounted under the motorcycle. Not even a rare earth magnet. I bought one for my motorcycle and it worked well.
Except you aren't doing it in a blinded fashion. Review the evidence: !:Prior probability, low as this is based off a misconception on how the censors work. 2:All test that confirm the effectiveness aren't well controlled and can be just the rain-maker fallacy. 3:One test show the lack of effect. Thees 3 factors would suggest that it doesn't work.
Dude, Check this site out. This is only one that I found that are selling this. I actually used it and can tell you it works. If you don't want to believe it, that's up to you. http://www.greenlightstuff.com/trigger.html
That link just gets a "404 (Page Not Found) Error" now...
Do a Google search for 'motorcycle green light trigger' and you'll find a bunch of different types. There is also a bunch on Amazon.com.
I just explained how you are most likely mistaken and you counter my argument by sending me to a site that has a major bias to claiming it works (IE they're selling it). Do you see the problem here? Restating the points, the magnetic field is too weak to effect the censor in any major way. The censers measure inductance not magnetic fields so non-ferromagnetic metallic materials will trip the censer. The only proof you've cited is anecdotal in nature and can fall under confirmation bias AKA the rainmaker fallacy. Finally bguiles recounts an experiment that negates the premise of thees devices. What are we left to think? The most likely conclusion is that thees don't work.
Wesfletch lucek3 years ago
He literally said, HE used it and it worked. It doesnt matter if the site has a bias, he doesnt. And, why does it even matter, you're here, complaining about someone ELSES work, saying its B.S. But, have you tested it? Theory is all well and good, but hard fact is necessary to even attempt a semi-accurate educated guess. I think, before you try to disprove someones hard work, you actually have the decency to take the time to back it up.
lucek Wesfletch3 years ago
look up the rainmaker fallacy would you.
@lucek: It sounds as like you are calling @rmelchiori a liar. Hmm. Well then, if you can do that you are without a doubt an expert on this topic.
No I specifically stated I didn't think he was a liar. The rain maker fallacy is a kind of self deception. it is very easy to trick oneself and the nature of this case appears to be such. Now I'm not an expert on the topic but what knowledge I have from my 200 level courses I've taken, research and reading from others says that this is wrong. Finally before accusing someone of slander check to see if you are in fact mistaken.
@lucek: Slander is verbal, you probably meant libel, that’s the one where you write it.
Pedantic is both.
@lucek: Your attempt to turn the attention on someone that pointed out your mistake by referring to them as nit picky is predictable. However, now you are up to two words used incorrectly. Anyone that can read can see you used the wrong word. They don’t have to be on the head of a pin to do it. You’re a bully. I’ll bet you love the Internet.
Um. pot, kettle, black much? Do you have a point beyond trolling?
randomray lucek4 years ago
Apparently you don't ride a bike , as many cyclists know they can tape a magnet to the bottom bracket of thier bicycle so the coils in the road will pick them up . Yes , this does work whatever the reason .Empirical data trumps theory every time . And lucek why are you trolling ?
Give this guy a break. Maybe he doesn't spend all day thinking about sensors! Why start a flame war?
These triggers work on the same principal as passive theft detection in stores: An oscillator is running with a very large coil. In the case of the car sensor, the coil is under the road. When something with enough metal bulk is over the sensor, it shunts the coil and changes the frequency of the oscillator.
It is the same principal as:
http://hackaday.com/2008/08/10/free-parking-garage-access/
All you need is for the magnet to be in close proximity to the sensor.
In the photos, the trigger type is a narrow loop. Those usually sense motorcycles anyway. It's the wide loop ones which don't. Almost none of them will sense a bicycle, so if you can make a bicycle trigger one, then you've got it.
The test I would propose it to have a wooden object at a objectively verifiable trigger (there was an example were the coil operated a gate) and install a magnet on it. Isolate the variables.
1-40 of 404Next »