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Investigating the Factors Effective on Prevention of Urban Accidents through Modification of Streets and Intersections

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Abstract (2. Language): 
Routes and their geometric conditions are considered as the most important traffic factors that play a crucial role in occurrence of accidents. In addition, the cost of such accidents is considered as one of the most important indices in terms of prioritization of geometric modification projects of accident-prone spots. This research investigates the effects of conditions of geometric modification of streets on occurrence of urban accidents. In this regard, the term geometric modification is referred to as the operation of analysis of system management and various geometric reformation models. The research is a field study and its required data are collected through library studies and field operations including inspection of streets; consistency of methods of implemented designs with consultants’ views and controlling the entrance and exit of passages. For the purpose of data analysis, the variance analysis method is applied. Results of this research indicate that a significant difference exists between rate of accidents before and after implementation of reformations. Before and after reformations, the rates of accidents differed significantly only between 9 to 12 and 12 to 15 hours. Before and after geometric reformations, accidents only differed in terms of manner of front side collision.
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