I would rather do an electro magnet via coil of wire that way people would see you push a button at a light and when the light instantly turns green they would think you are a GOD that solved all of life's hassles.
They will ask you important questions,and you will know the answers.
In that thread about "Miracle Lubricant", I mentioned the two cattle magnets that have followed me around for thirty years. I am sure they have more than 6 lbs. of magnetic pull !!
They are oblong, weigh about two ounces, shaped like a "bolus", have HIGH power to weight ratio. You take a balling gun, insert one per animal, and they collect all the nails, rusty wire, etc that a cow vacuums up grazing, stay in the upper stomach for the lifetime of the animal to prevent "hardware diseases", weigh enough where they never pass through the animals digestive system.
These magnets look perfect, my vet supply catalog says prices run from 1.89-3.00 each, a large animal veteranarian should have them.
I'm going to test it, there is ONE light in Cullman that bugs the tar out of me !! The shape of the bolus should fit perfect on one of my basket legs.
I always thought those strips sense weight,that the weight of a car pinches the metal. So every time I come to a light,I pump my brakes hopping my car and the light turns green.
On my motorized bicycle,I do bunny hops.