In transportation safety studies, the presumption of sameness hardly ever holds good. In the comparison of accident and fatality rates for different modes of transport (air travel vs. road travel), rates for different modes of road transport (lorries, cars, motor-cycles, etc.) it is definitely wrong to assume sameness. By itself, over-representation in accidents or fatalities
has no discernable logical link to funding, programming, decision or action. The decision-making process should be concerned about establishing the relevant facts, adopt a set of proven countermeasures and base the decision on the cost effectiveness of the preferred solution.