QUOTE (wingwalker @ Mar 21 2010, 17:55)

Yes, I get that, but how do they policy it? Cars are moving at 100 km/h in the pits, enforcing such a rule without a fool proof mechanism of checking whether the rules were breached is letting a door wide open for controversies and I haven't heard anything about additional sensors being installed all along the pitlane. Human eye won't do the job - there is plenty of mistakes in football when it comes to player being offside, and in here lollypop man is required to judge whether a car approaching him at 100 km/h is 54 or 56 yards from here at a given moment. That's about half of a football pitch lenght, I think judging whether stationary cars would be just behind or in front a marker would be hard enough, but at 100km/h? There has to be a system to make it work, but I haven't heard anything about it. It could be GPS, but I had no idea those things can be that accurate when it comes to fast moving objects.
Though watching cars on a motorway I know it's not that difficult to tell if a car is past a stationary object. Remember, the lollipop man doesn't have to judge the distance, but whether the car is in front or behind something, which is much easier. Presumbly all they need to do is review the video in a controversial situation. I reality I don't know, I'm just guessing.