Overtaking is obviously one of the most common and dangerous acts on Australian roads that have only two lanes and no special overtaking lanes. The problem for drivers is that of working out how safety to overtake on two lane undivided 100 km /h roads. Examination of police records about fatal crashes on 100 km /h roads has revealed a number of fatal crashes in which vehicles, known to have been overtaking others hit oncoming vehicles head-on or went out of control and hit vehicles or rigid roadside objects.
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