Wind turbines mounted on roadway lights, powered by the wind of cars rushing past.

I was on a stretch of highway late at night recently where the lights were not working.  There was a snow storm, and I could hardly see beyond my dashboard.  And yet, the power required to light roadways seems like such a waste of energy.  So here’s a solution, at least in theory. Is there any downside, beside light pollution?

[via Engadget]