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As Boris Korsunsky said on physlrnr, this idea does not sound 'obviously
ridiculous' to him, nor to Charles I think, nor to me. I'm not sure the
roadway piezo-electric proposal can be dismissed simply by appeal to
'conservation of energy', without considering the various energy
transformations involved, both with and without the roadway piezo-electric
transducers in place. Let's assume that some energy is normally
dissipated as 'heat' in the roadway anyway as cars pass over it and deform
it slightly. If some of this were to generate energy in piezo-electric
transducers instead, then energy remains conserved, just in a more usable
form now, without requiring more energy from the car. The roadway would
not get as warm presumably? Of course I know nothing of the details or
mechanism of the proposed system so correct me if I am missing something,
but I'm just conserving energy without taking more from the car.
David
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