This map input space to output space, different fuzzy scenarios could be considered. Figure 2 above illustrates the framework of conceptual fuzzy model that is used to forecast the number of trips in this work. As it illustrated in above, three independent fuzzy inference systems are used. The first FIS is aimed to map generation variables to number of generated trips by the given region ( Gi ).The second FIS is designed to map attraction variables to number of attracted trips by the given region ( Aj ). At the end, the third FIS is designed to combine the output of the first and second FIS for aggregation of two given regions Gi and Aj and calculating the final total number of trips between two regions (Ta ).