I don't know anyone that works for the DOT so I'm not an expert. I just a plain old guy with a motorcycle that gets stuck at the light for a few minutes till a bigger car pulls up and the light turns green. I don't know if this magnet thing works but I do know the problem is real and I would try strapping a live chicken to my rear tire if that could help.

In my city in Canada. It's legal for motorbikes to "run" those lights....since we'd be waiting until another car comes for them to turn green. I like it that way. So at night when there's little traffic I just treat them like 4 way stop signs. Cops can't bust me for running a red that never turns green.

Dude you are very lucky!

You mean in other countries if you went to a red light at 4am. You'd have to sit there for hours waiting for a car to come? I doubt it.

| used to work for a company that installed intersections, lights, poles, guardrail, etc, etc, and that is exactly how they work.

In the grooves cut into the pavement shown in the video lie only 2 'wraps' of wire. More wraps means more 'sensitivity' which is why some turn lanes will have more wraps and other lanes will have less, to help the computer determine which lanes need to go first/longest. The amount of ferrous conductive metal present in any vehicle directly affects the speed with which this system responds to traffic demands.

Great Idea Kip!!

voicing my own opinion is all

Now that would be funny looking. It would all be worth it!

i ride... all lights dont' work.

what happens when they do road repairs and cover up the coil? Now it's 2 inches deeper than it was and the sensitivity is cut in half?

Magnetic forces go throgh anything. It would not be affected by the road surface, except that cars are now a couple of inches futher away. A good example of the unstopable force of magnets is the earths magnetic field, it comes from the center of the earth and isnt affected by the materials in the ground.

Magnetic forces decrease proportional to the square distance.

a few inches here! Attatched to a scooter or motorcycle in the right spot would put it about 5 or 6 inches from the ground.

A magnet as large as the earth would certainly disregard a few inches of dirt or asphalt, however stating that any magnet will go through anything is ridiculous.

you must have never taken class because he is right, magnetic fields are not stopped by anything. It is impossible to "stop" a magnetic field, but one can redirect or nullify its effects with another field. In fact asphalt or anything which has electrons will most likely strengthen a magnetic field. Of course the real problem here is that the wires are now under ground a few inches so they will have a harder time detecting the vehicle because it is farther away...

why can the magnet on my frigde hold one sheet of paper but not ten?

This is because its not a very poerful magnet. When it is 1 paper thickness away from the fridge, it is still has enough pulling power to hold the paper on the fridge. But add 5 more paper thicknesses, and the magnet is now 5x as far from the fridge, thereby decreasing its pulling power. This coupled with the added weights of the paper cause them to fall down.

the magnet isnt pwoerfull enougth. if they were all the same. you could make your very own bumber-car ring made out of refrigerator magnets and then post it on metacafe and make money. :)

Please give me thumbs up for this comment. I think its good. :) lol

o really then that kind of eliminates the whole thing about distance from the bike not mattering. You just completely negated the earlier statement. HMMM...

besides that it probobly isn't a strong magnet, it can't really magnetize five sheets of paper, but your point is also null because refrigerator magnets use friction to keep the paper up, a better way to test it would be to set up a gauge to measure small units of force and put the magnet close to the metal object(not touching), and then put a thin object (like a piece of paper, or multiple pieces) in between the magnet and the metal and see if the force of the magnet is differed.

.

magnetic fields can be completely sheided inside an iron sphere, so it doesnt go through anything

the reason a compas always points north?

Compas do not always point north,
they point to the most powerful magnet.

Put a magnet or even some iron in around a compass and it will point to it, not north.

futher distance means less strength, small metal mass means less magnetic strength or inductance, Motorcycle shops have been selling magnets for this purpose for many years, Do an ebay search I remember seeing them on there also
I know you have a brain, use it

Wow, you not only do not understand the electromagnetic force, but you also site a great reference against your argument. The Earth actually bocks out 98% of the magnetic field generated by the core. Any number of materials block, to a great or lesser extent, magnetism. I don't know what a few inches of concrete or asphalt would do to the magnetic force of the coils, but to state that it does nothing is just plain stupid. Time for you to take Physics again.

S=23 12[d] + A/6 V=7.333 (S+H2) - ((MC2)+(P100))

There, I do not need to say any more. Thanku & Goodnite.

Dd

the magnetic is to trigger the sensor. but the bike not being heavy enougth is would could be the problem with the pavement :)

part of the wire to pavement milling, which has more of an affect (supposedly) than more asphalt because (as it was explained to me) the pavement doesn't interact with the magnetic field, so it doesn't diminish it either. I say insulation is insulation,,

Milling however can destroy an entire intersection of sections are milled away to the point of open circuit.

neither of my motorcycles ever trip traffic lights. my current bike is 400 pounds.

they are electromagnetic signals as he said. pull over the wire and it will trip it.

your dad is full of crap. go buy him some pampers

is that like most devices there are tolerances. Depth of the loop, tuning etc. I have been stuck at some and triggered others with mine. I'll be bicycles and mopeds are worse. I bet a dollar to a dime that Kip is smarter than your dad. Is he a DOT electronics engineer or a signholder?

is the guy that designs the roads you ignorant ass.

So what you are saying he is not a DOT Electronics Engineer. Let him look at this thread and explain his opinion to you in laymans terms. I have given mine and given that I have both Mechanical and Electrical Engineering degrees - I am not ignorant on this general subject and think I have a hold on the technical aspects of this thread. You may want to find out the specifics from ol dad and determine if they apply. Remember, different areas use different sensor systems before you fly off the handle again.

actually not even half the bikes out there can trigger the sensors. if you have a big harley than you should be ok. but for most croch rocket riders like myself. most times we're sol. and cars dont always bull up behind you at night :) remember i actually ride

yes i do think the same as kudo its just a guess that it would work :P

Its all about getting people to watch the videos, real or not. He has creativity and thats what its all about *) Cheers Kip.

your dad tried to pick me up one day while i was pooping in JFK airport..I learned from Craig and ran away,,Tell your dad to stop trying to get young men to blow him while pooping

First of all, the difference between a car and a motorcycle in this case is not the weight, its the ammount of circuits and stuff that makes electrmagnetic fields that can change the light to green.
The magnets that he put are to make a bigger field, the force of the field is bigger as is closer to the center and then disapears.I think that the asfalt doesnt matter, what makes the differnce is a bigger field that can go stronger in longer distances.Hope im right

a runaway we paid $2 to appear in the video.

*feels dumb*

I LOVE YOU KIPKAY!!!

I forgot what !was reading about, keep it simple!

There is an algorithm that gives the necessary time to each side of the road in order to obtain the better possible trafic flow. You can get the green light almost immediatly only if you are the first vehicle arrived ...

this video is wrong because now they use lasers mostly on roads

never seen those on the road before, where do you live?

But then they would just stick to the bottoms of other cars and all would be normal and red again.

Not breaking any laws...

If u mess wit da system, da bosses aint gonna like it.

I meant to say "so that it is inducing current onto the wire."