Communication network is important in transportation of goods and passengers between residential areas. The main concern of planners and experts is to select suitable location for communication network construction. Since, the classical and traditional methods are costly and time consuming for routing and inaccurate proposed route are not included factors as environment, economic, technical and engineering. The use of Geographic Information System in spatial-temporal analysis causes macro saving in economic issues and time, providing a framework to obtain accurate and easy access to the aim of the planners. This study determines the best optimal route using multiple information sources such as topographic information, land-use, geology, faults and pathways. The result indicates high efficiency of GIS analysis in determining the optimal route. The study area is located in southeast of Yazd province as the second railway track of Yazd - Bafgh. The data and factors influencing railway routing is by using AHP and GIS software, methods are designed to determine railway route location. Consequently, a number of factors were studied influencing the railway route. Using ILWIS and ArcMap software, models were designed and the results proposed routes for the planners to select the most suitable and shortest path between two points.