"Barring polygamy, you will break up with every person you date minus one." - Yellow
Question #45140 posted on 05/26/2008 3:01 a.m.
Q:

Dear 100 Hour Board,

If a heavy traffic city like New York, NY embedded a band of little piezoelectric generators just under the road surface at all four corners of its busiest intersection and these generators all fed into a battery, about how many kilowatt hours could the city generate in a day?

- Energon Cube

A: Dear Cube,

I'm having an awfully hard time getting good information on how much energy piezoelectric materials can generate in a situation like this, so I can't give you a number. However, from reading about proposals similar to yours, I do know that most involve putting piezoelectric generators under an extensive stretch of roadway—say, a mile. Thus, I don't think that picking a single intersection, even an extremely busy one, would produce enough power to make it feasible.

—Laser Jock