This paper is an output of a French national project called iSpace&Time aiming to provide a 4 dimensional platform of an urban
dynamics. In order to express the urban traffic, we took an advantage of the mobile phone data to investigate the behavior of the
origin destination flow within the Paris and its suburb aiming to explore the different mode of the transportation. Indeed the
spatiotemporal heterogeneities of mobile phone data make the task of mode of transportation separation very challenging,
sometimes even impossible. Thus, by exploring the OD matrix in order to revealing any probable continues trends or any
dominant trace of the flow stating a specific mode of transportation, the commuter trains happened to be somehow detectable.
Then an individual-based step-by-step approach is proposed to estimate mode of transportation from mobile phone data.
Analyzing the individual trajectory, the decision is given to a segment level with respect to