@aklyatne if you know anything about Vehicles or mechanics, you would know that all this is doing is using the already produced force produced by the car, it would in fact, not, slow down cars. It is a great idea, however unnecessary, I agree that headlights should be sufficient.
not a bad idea at all! the wind velocity coming off of vehicles is such a waist of energy. way to go humans thinking of new ideas to create energy that is already there!
Terrible idea. These would slow down cars, wasting a ton of energy - not to mention the energy wasted in producing and installing them. Lights like this along a road are totally unnecessary - that's what headlights are for. There are a myriad of other problems, as well.
People should stop pretending to be engineers.
Reflectors. We already use them.