high crash areas resulting in injuries and deaths in tehran traffic areas from november 2011 through february 2012: a geographic information system analysis

background: evaluation of intra-city roads in terms of environmental factors of motor vehicle injuries can help us to better identify these factors and the share of each of the factors in injuries. therefore, this study was conducted to determine the high injury areas and the risk factors of motor vehicle crashes resulting in injury and death in tehran, the capital city of iran, from november 2011 through february 2012.   methods : in this cross sectional study, the locations of the motor vehicle injuries resulting in injuries and deaths were obtained from police stations in tehran. the coordinates of the injuries locations were extracted and entered into the arc-gis software to overlay the different layers of geographical data and extract the risk map.   results : a total of 4257 motor vehicle injuries were evaluated in this study. forty-two injuries (1%) resulted in death and 4215 injuries (99%) resulted in injury. the traffic districts 5 and 21 had the highest frequency of injuries resulting in death. the type of the motor vehicle resulting in injury or death was motorcycle in 2330 injuries (54.73%).   conclusion : the frequency of traffic injuries is more in the west and northwest areas of tehran, and it is caused more by motorcycles in terms of traffic and motor injuries resulting in injury and death. it is useful to conduct more studies to better identify these factors considering their importance in traffic injuries.