To 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
( i G ).The second FIS is designed to map attraction variables to number of attracted trips by the
given region ( j A ). At the end, the third FIS is designed to combine the output of the first and
second FIS for aggregation of two given regions i G and j A and calculating the final total number
of trips between two regions ( ij T ).