The is video available of the incident. Do not search for it unless you really feel the need to see it. Some do, and I understand that. I needed to know more and I have seen it. What is clear is all the guards or rails or whatever around a tractor would be useless, it would just destroy a car in a different way. They have spent millions making the tracks and the cars safer, then jeopardize it all by allowing such vehicles to be on the wrong side of the barrier. It may be a minute chance of occurring, but the outcome I have just watched is unacceptable. A better way has to be found. As a side note, it is incredible we don't also have a bunch of dead marshalls.

Caution again if you want to watch the video, you cannot unsee it