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Anaiysis of air traffic control capacity shows the relation between traffic level and risk can be dealt with quantitatively only if units of risk are specified. Measuring risk in terms of fatalities per hour of exposure solves the major problem of how to compare the effects that many different kinds of patterns of human activity, but leaves us with a number of unresolved secondary issues. Among these are: incommensurability of certain risks, failure of statistical independence, certain limitations of time-normalization;
unequal distribution of costs and benefits; different weighting of voluntary and involuntary risks; liability, cost and value of uncertainty; positive value of some risks; acceptability of unequal risks; difficulty of esti-__.l__ _____. ____I, ___l__Ll*l.:___ __s _L---_ -*LL-*..._.._ ..~~~~ ->.-. . ~~1 r., marmp very sman prooaomrtes; ana w-ear 01 me unknown compareo TO rnreat ox me known.
Although these issues arose out of air traffic control studies, they are clearly relevant to risk analyses of many other systems.
BARBARA PRFSTON: Statistical analysis of child pedestrian accidents in Manchester and Salford.
📜 SIMILAR VOLUMES
Problemes dans l'analyses rationelle de la s&mite en transport. Accid. Anal. &Prev. 4, 313-321. RktmGL'analyse de la capacite du controle de trafic a&en montre que la relation entre le niveau du trafic et le risque peut ttre considtrte quantitativement seulement si les unites de risque sent spkcifi