Looking at the Google Street View photos along that long highway, you can see the black and pink blurry geometrical shapes, sometimes more clearly, sometimes more blurry, sometimes in front of the power lines, but always at the same angle above and to the right of the car, even when the road curves. It never looks clearly like a human form.
There were also many other cars on the road, and no one else captured this on film?
maps.google.com/maps rather long and snipped.