Re: traffic lights
 

I just contacted the Washington State Patrol, and this is the reply I received.

I guess I'll just have to call the police department for every instance I have of getting stuck.... O_o

Re: traffic lights
 

In that case, double check that there are no cops around and juts go for it ;)

I'm not actually telling you to do this.... that would be wrong.
But that's what I do.

Re: traffic lights
 

i have found that if you put some "rare-earth magnets" the strong ones of course on the bottom they usually work very well.

Re: traffic lights
 

Please excuse my ignorance,but what is a "rare earth magnet"? :??:

Re: traffic lights
 

Rare-earth magnet
From Wikipedia, the free encyclopedia
Ferrofluid on glass, with a rare-earth magnet underneath.

Rare-earth magnets are strong permanent magnets made from alloys of rare earth elements. Developed in the 1970s and 80s, rare-earth magnets are the strongest type of permanent magnets made and have significant performance advantages over ferrite or alnico magnets. The magnetic field typically produced by rare-earth magnets can be in excess of 1.4 teslas, whereas ferrite or ceramic magnets typically exhibit fields of 0.5 to 1 tesla. There are two types: neodymium magnets and samarium-cobalt magnets. Rare earth magnets are extremely brittle and also vulnerable to corrosion, so they are usually plated or coated to protect them from breaking and chipping.

The term "rare earth" can be misleading as these metals are not particularly rare or precious;[1][2] they are about as abundant as tin or lead.[3] Interest in rare earth compounds as permanent magnets began in 1966, when K. J. Strnat and G. Hoffer of the US Air Force Materials Laboratory discovered that [[YCo5]] had by far the largest magnetic anisotropy constant of any material then known.[4]

Re: traffic lights
 

Ah...........THOSE rare earth magnets! :??: :whistle: O_o :techy:

Re: traffic lights
 

The small sensors on top of the traffic signals are emergency vehicle preemption sensors. They are set to recognize the strobe lights patterns on your local EMS vehicles and change or hold the light for the emergency vehicles. While they are not magnetic induction loops, remember that law enforcement takes a dim view of people attempting to mimic them in any way.

frempath

Re: traffic lights
 

How can I find out , (where would that kind of info be ?) if they use those sensor lights in NYC ?

Re: traffic lights
 

Do you know any ambulance drivers or firemen? :)

Re: traffic lights
 

As far as I know from reading posts and forums on this subject, it's not only the small magnet or the magnetic field these sensors respond to, it's the mass of metal it senses, which is really the same thing I guess. There is a great amount of discussion about the use of magnets per se and if they actually do anything at all.
Read this article about some tips to trigger the sensors--
http://m.wikihow.com/Trigger-Green-Traffic-Lights
.
Here is an article written for bicyclists but it applies to motorcycles too.
http://www.humantransport.org/bicycledr ... ection.htm

Attached is a technical article about inductive loops and a diagram of them and how they work.

If you do get a really strong magnet, like with 50lbs of force, be wary of picking up something on the road which can get into your chain or wheel.

If the sensor in our area is pressure activated, responds to weight, you may be screwed.
The surest way to change the light, if safety permits, is to get off the bike and hit the button at the crosswalk. :)
http://s2.postimage.org/2aqtlyk6c/magnet_sensor.jpg