Assessment of road accidents caused by the transportation of hazardous materials in transit route Tehran - Bandar Abbas.

Any substance that damages the people, equipment and the environment might have been considered as hazardous material. Consequences of an accident during the transport of hazardous materials can be the effect on human health( Such as death or bodily injury) ,environmental impact, traffic problems, etc. Increasing the transportation of these materials results the risk of increscent of accidents and damage caused by these events. Due to the last events occurred in this issue and unfortunately financial, environmental loss and above all life loss have been occurred, evaluation of the material transportation accidents is necessary. Considering that the most hazardous materials transportation take place by roads, the purpose of this article is the spatial assessment of road accidents caused by the transportation of hazardous materials. Assessment of hazardous materials in road transportation accidents requires a range of data ,Statistical data ,analysis, modeling and spatial decision-making at different levels of location. For this purpose, Geospatial Information System (GIS) can facilitate the process of problem solving by its instrument and competences. In this paper we evaluate the effects of toxic gases. in the case of toxic gases the Gaussian or Heavy Gas model is used because of considering the effects of wind speed and direction and atmospheric conditions. To implement the articles by using the Aloha software, earn the effected areas and then enter these areas into GIS for using the GIS capabilities in spatial analysis. Final results obtained in this paper, analyze the possible effects of these materials delivery in the old road of Qom – Tehran in Hassan Abad city.