What about something even simpler like specially designed 1/2 inch air hoses, that when ran over, take the mechanical pressure applied, and force air out, and transfer that into electric energy? Wouldn't that be simple enough to work?
I am trying to determine how much energy can be, in ideal circumstances, harvested from piezoelectric crystals that draw pressure from being buried in roadways.
To start, we found a basic fact on Wikipedia;
http://en.wikipedia.org/wiki/Piezoelectric
"...a 1 cm cube of quartz with 2 kN (500...