The invention relates to a method of processing data from at least one sensor of a vehicle, called ego-vehicle (EV), for managing the longitudinal movement of the ego-vehicle undergoing insertion (INS) of a another vehicle, called target vehicle (VC), in front of the ego-vehicle, the method comprising the steps of: - acquisition by the sensor of the ego-vehicle of data relating to the target vehicle, said data comprising movement data of the target vehicle and information relating to the activation of at least one indicator of said target vehicle; generation of a probability of insertion of the target vehicle as a function of said movement data and of said information; - determination of a quantity relating to the longitudinal movement of the ego-vehicle as a function of the probability indicator.
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