If anyone really wants to do an experiment, why doesn't someone park on the road where the headlights are coming from and RECORD exactly the time cars are driving on it - and someone record when they see the "lights" from the viewing point. If they match up then maybe there'd be a little more "Proof" that they're actually car headlights.
Also if you do some searching on the internet there's actually quite a few places in the US with "ghost lights" like Paulding, with similar stories (especially about a man with a lantern who was decapitated by a train) and are all "unsolved". What about them? All of them can't be headlights otherwise some would have spoken out about it already.
We did the same thing. We had walkie talkies with a 22 mile range and a hand held flood lamp with 3million candle power. At different times we could see the light and the people waiting for us back on the second hill could not and vise versa. They could see my light every time I flashed it. I couldnt keep it on too much because it is a very blinding light and it wears the 12 volt battery out in 20 minutes with each use. LOL
I've even video taped it with an infrared camera and it leaves an infrared light trail behind it. So it hits various sprectrum levels that we cant even see. I'm not a paranormal expert nor want to be one. I just want to figure out what the darn thing is.