Just one more way in which the car culture screws bicyclists: traffic lights. With the advent of inductive loop traffic sensors, traffic lights suddenly knew when there was a car waiting to go, and could keep the light red until there was a car. But that means indefinite waiting and eventual required law-breaking by bicyclists.
Well, screw them. Watch the video above and learn. Strap a simple inexpensive neodymium magnet to the bottom of your bike frame and, voila, you're now a recognizable presence in the automated car culture.
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written by EV, September 21, 2007
You could get off your bike and lay it flat against the ground. In most cases, that will be enough to trip the inductive sensor.
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written by Jono, September 21, 2007
I used to think the sensors worked by detecting the weight of cars, and that my bike and I just weren't heavy enough. Good to know I can set them off with a tiny little magnet, instead of having to bulk up!
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written by Shu, September 21, 2007
I used to pound the front tire into the area with sensors...
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written by sebnukem, September 21, 2007
Does anyone know if it works with hard drive magnets?
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written by David, September 22, 2007
Gotta try this one after giving up my car last year. 
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written by John Fill, September 23, 2007
If you're on a motorcycle you can trip the sensor by putting the kickstand down...
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