from Innowattech's site: "The generators are placed under the upper asphalt layer. The generators possess the same elasticity as the asphalt, and therefore, provide the same resistance to the wheels as asphalt". Looks like a nice solution!
Ya i see it weird i think it is just made up would be nearly impossible to play and the notes at the beginning are to high above the staff to recognize.
Looks like a nice solution!