Ramp generates electricity from cars passing over it

from Boing Boing by Mark Frauenfelder

Mark Frauenfelder: Here is a proposal for an energy generation system. The idea is to pump a generator when a car drives over panels attached to the generator.

I hope the people who came up with this idea realize that the energy they get from the generator will be less than the extra fuel the car must to burn to drive the generator. Link Jon-o says:

Mark mentions that this will just result in more gas being burned by cars, completely offsetting any power generated, but cars spend a lot of time *braking* as well -- if a device like this was put near the bottom of a downward slope, or somewhere else where cars need to slow down, it would be making use only of energy that would otherwise be wasted as heat in the brakes.

(Would this work for hybrid and electric cars that use regenerative braking, too? -- Mark)

Daniel says:

My first thought at seeing the title of your post on the electricity generating ramp was that it would be energy inefficient, but then I realized that if it were on a downhill where you would be breaking anyway, it doesn't matter if it slows your car down - it's a little side benefit and less wear on your breaks. Their YouTube video of it is stupid and wasteful, but the idea doesn't have to be. Also, using it as a speedbump as implied by the article is another bonus, in areas where that's necessary.