o27: prevention of road crashes in iran

without any doubt, road safety (rs) needs a precise planning in road accident prevention. rs effects on different fields of the life. therefore, response to this need in order to promote the rs as well as to save more lives is the most asset in each country. in the recent years, statistics have been shown that the numbers of mortalities due to road crashes decreased. this shows the true motion to improve the roads facilities and safety. it can be useful in all sectors and area in road engineering and cultural and social fields. in this regard, some points need more attention in rs such as to recognize the black spots, to arrange the police forces in appropriate situations, to interact with relevant organizations, to prepare the traffic signs.