PROBLEM TO BE SOLVED: To provide a congestion incentive driving action evaluation method for accurately evaluating whether a deceleration action is a congestion incentive action.;SOLUTION: The congestion incentive driving action evaluation method detects deceleration of an own vehicle S14, determines the existence of a preceding vehicle and a subsequent vehicle S16, S23, acquires travel information including at least the speeds and acceleration of at least the preceding vehicle, the own vehicle and the subsequent vehicle in the case of confirmation the existence of the preceding vehicle and the subsequent vehicle S17-S20, S25-S29, calculates an own vehicle minimum deceleration aomin from travel information relating to the preceding vehicle and the own vehicle S30, determines whether an own vehicle deceleration is a congestion incentive action by comparing an own vehicle minimum deceleration with an own vehicle deceleration aoa S31, calculates a subsequent vehicle minimum deceleration armin from travel information relating to the subsequent vehicle and the own vehicle in the case that the own vehicle deceleration is a congestion incentive action S32, and calculates a congestion incentive degree of the own vehicle to the subsequent vehicle by using the subsequent vehicle minimum deceleration.;COPYRIGHT: (C)2014,JPO&INPIT
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