Enlil: Wind turbine designed to harvest energy from passing vehicles

I think that must mean that it slows down that wind, decreasing the benefit other cars have driving in the wake of other cars.

I think the net effect will still be positive (especially on roads with traffic in two directions close to each other), but still, the energy has to come from somewhere, and I don’t think _all_ of it comes from wind that wouldn’t help other cars driving along the same path.

So, what’s the effect on energy usage of the cars?

how about piezoelectric cells that utilize the passing weight differentials in the road bed ---- load/unload/load/unload etc.... these cells work on the principle of alternating mechanical stress....