Abstract
The characteristics of vehicles in water as described in B 1071 are hardly changed. Since 1970 the number of fatalities by this kind of accident is decreased from 90 to about 50 per year. This is due to some modifications in the design of cars (bigger windows and a "fifth" door) and by making safety fences along the waterside on dangerous spots. A mathematical model can be made on the cost- effectiveness of such safety fence constructions. A regional inventory of locations where vehicles have been fallen into the water is the most appropriate to set up a good policy.