(l) The risks of flying and driving are influenced by different parameters. (II) The risk of driving depends largely on the distance travelled. (III) Most people do, in fact, realize that flying is safer than driving, but still get nervous about it. (IV) The risk of flying is primarily affected by the number of take offs and landings. (V) Indeed, over a 10 year period, 95 per cent of all airline fatalities occurred either during take off or during landing.