Spatial-Quantitative Environmental Assessment of Three SHIRAZ Alternatives Railway with Enhanced YAPP-FAHP Method

Rail safety is a very complex subject, with various factors involved. Many of the risk assessment techniques currently used in railroads are routine techniques. In this study, the YAPP upgraded method was used.

 In this method, three indicators are used to estimate the risk of each alternative. The risk associated with the length of each railway alternative, the risk of population density and the number of residents around each alternative, and the risks associated with the geological situation and the milestones of each alternative. To complete the evaluation of options, the FAHP method is used to prioritize them based on the YAPP indexes and sub-indicators.

 In this study, there are three alternatives for Shiraz railway, one, Kazeroon-Farashband, Second, Kazeroon-Quar and Shiraz-Noorabad. The study results show that the third alternative is the safest alternate with a risk value of 127.779 compared to two other alternatives with risk values ​​of 277 and 298. Based on the results of the FAHP prioritization, the third option was also identified as the preferred option.

 The YAPP method, taking into account natural and human factors in assessing the risk of railroads, is an efficient method that can be used to select optimal and safe paths in the design and planning phase of the projects. Using the multi-criteria decision-making methods along with the YAPP method, the choice of the final option is made easier and more scientifically.