Analysis of Road Accidents Caused by Transport of Toxic Gases in the Town of Hassan Abad, Located on Tehran - Bandar Abbas Transit Road

Any substance that damages the people، equipment and the environment may be considered as hazardous material. Consequences of an accident during transport of hazardous materials can affect the human health and led to death or injury، environmental impact، traffic problems، etc. Increasing the transportation of these materials results the risk of increscent of accidents and damage caused by these accidents. Due to the last accidents occurred in this issue and unfortunately financial، environmental loss and above all life loss have been occurred، evaluation of the material transportation accidents is required. Considering that the most hazardous materials transportation takes place in roads، the purpose of this paper is the spatial assessment of road accidents caused by 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 effects of toxic gases were evaluated. In the case of toxic gases the Gaussian or Heavy Gas model is used because its ability to consider the effects of wind speed and direction and atmospheric conditions.