Abstract
The paper presents the results of research to develop methodology for a rapid assessment of the effect of measures used to improve road safety. The research includes the improvement of the method of determining traffic conflict situations and the development of accident prediction in conflict situations. A method of conflict situations is one of the most advanced and effective methods for predicting accidents at conflict sites since this method is based on the dependency of the number of accidents on the number of conflict situations. Having determined at the study site the number of conflict situations it is possible to calculate a predictable annual number of accidents at that site. The research implemented gave a possibility to increase the accuracy of accident prediction according to the method of conflict situations making it suitable to be used in practice for assessing the quality of road safety measures at the conflict sites – signalized intersections and pedestrian crossings, in the zone of which the artificial speed humps have been installed, such as a “sleeping policeman”.
Highlights
Road traffic has safety, environmental, economic and social threats
Its creation required improvement in terms of the accuracy of the existing method of predicting road accidents in conflict situations which is built on the basis of the said method
The control calculations are repeated in case of significant divergences and if the results prove to be true the measure to be introduced is corrected
Summary
Environmental, economic and social threats. For road users the most crucial of all the threats is the accident rate, since it directly affects their lives, health and welfare. Where Ра – projected annual number of road accidents, acc./year; Ncfs – number of conflict situations, cfs/year; ηcfs – the reduction coefficient of different type of conflict (Table 1). This is the method of conflict situations proposed by the Swedish researcher С. The number of conflict situations at the certain site within 5 h is counted These figures are further calculated to the number of conflicts per year, it is multiplied by the appropriate factor ηcfs and as a result the expected number of accidents per year is received.
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