Abstract
High Statistic of accidents in Iran on one hand, and limited budget allocated on provinces by government to execute road construction projects on the other hand show that mentioned budget is not sufficient to transportation safety all regions in our country. Then firstly, it is necessary to survey accident studies and accident black spots, and try to safety these regions from economical point of view. Research on Ahvaz-Shoushtar axe show that most of these accidents happened in cross-roads, main ways and entrance of villages. Therefore, special pattern was provided to safety mentioned regions by safety signals, that showed according to executive costs of plan and comparing them to annual accidental costs in Iran, statistic of accidents decreased so much and was evident of economical save in budget in our country.
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