SOrt of Picky,
That logic was dervied at by raising the costs of transportation to such a level at which more people would go to cars where statistically they were more likely to die.
Its an arcane numbers theory thing, but how do you make a decision? I can guarantee that people are never killed in an aircraft, simply stop flying aircraft. Of course more people would die on the highways than would have died in the airplanes so have you really gained anything?
Cheers
Wino