I've heard about this as well, apparently if you're able to see the light it veers off the road after a while because the 'ghost' crashes into the bushes. I indirectly knew 3 people that were killed along that strip a few years ago due to speeding - the car in question became airborne off the undulations in the road and collected an on-coming car. The idea of doing 180km/h along that road is so idiotic.