In order to provide a vehicle behavior prediction device and a vehicle behavior prediction method, and a driving assistance device that uses said vehicle behavior prediction device, which enables vehicle behavior to be predicted in a highly accurate manner, a vehicle control device is installed in a vehicle. This vehicle control device is provided with a distribution calculation unit and a vehicle behavior prediction unit. The distribution calculation unit determines, on the basis of driving condition information that has been collected, probability distributions for when deceleration behavior occurs and does not occur. The vehicle behavior prediction unit determines the relative positional relationships between the driving speed and acceleration of vehicles ahead with respect to the probability distributions, and, on the basis of the relative positional relationships that have been determined, predicts the behavior of a vehicle that is subject to prediction.
Please help me write a proper abstract based on the patent claims. CLAIM: 1-24. (canceled) 25. A vehicle behavior prediction device for predicting vehicle behavior based on traveling state information representing a traveling state of a vehicle, wherein the traveling state information includes at least one value of traveling speed of the vehicle and acceleration of the vehicle, the vehicle behavior prediction device includes a vehicle behavior prediction unit, which collects the traveling state information, inputs a plurality of kinds of probability distributions representing occurrence probability of vehicle behavior with respect to the at least one value obtained based on the collected traveling state information, and predicts vehicle behavior of a prediction-subject vehicle based on whether the at least one value concerning the prediction-subject vehicle belongs to one of the plurality of kinds of probability distributions, and it is determined whether the at least one value belongs to the probability distribution depending upon whether the at least one value is included in one continuous region in which occurrence probability in the probability distribution is greater than zero. 26. The vehicle behavior prediction device according to claim 25, wherein the plurality of kinds of probability distributions includes a probability distribution at occurrence of specific vehicle behavior and a probability distribution at non-occurrence of the specific vehicle behavior. 27. The vehicle behavior prediction device according to claim 26, wherein when the at least one value belongs to the probability distribution at non-occurrence of the specific vehicle behavior and does not belong to the probability distribution at occurrence of the specific vehicle behavior, the vehicle behavior prediction unit predicts that the prediction-subject vehicle will not exhibit corresponding vehicle behavior. 28. The vehicle behavior prediction device according to claim 26, wherein when the at least one value does not belong to the probability distribution at non-occurrence of the specific vehicle behavior or belongs to both the probability distribution at non-occurrence of the specific vehicle behavior and the probability distribution at occurrence of the specific vehicle behavior, the vehicle behavior prediction unit determines that it is indeterminable whether the prediction-subject vehicle will exhibit vehicle behavior. 29. The vehicle behavior prediction device according to claim 26, wherein when the at least one value belongs to the probability distribution at occurrence of the specific vehicle behavior and does not belong to the probability distribution at non-occurrence of the specific vehicle behavior, the vehicle behavior prediction unit predicts that the prediction-subject vehicle will exhibit corresponding vehicle behavior. 30. The vehicle behavior prediction device according to claim 26, wherein when the at least one value does not belong to the probability distribution at occurrence of the specific vehicle behavior or belongs to both the probability distribution at occurrence of the specific vehicle behavior and the probability distribution at non-occurrence of the specific vehicle behavior, the vehicle behavior prediction unit determines that it is indeterminable whether the prediction-subject vehicle will exhibit corresponding vehicle behavior. 31. The vehicle behavior prediction device according to claim 26, wherein the vehicle behavior is deceleration behavior of the vehicle, the vehicle behavior prediction unit collects information representing traveling speed and acceleration of the vehicle as the traveling state information, the vehicle behavior prediction unit inputs a plurality of kinds of probability distributions obtained for each of traveling speed and acceleration of the vehicle, and the vehicle behavior prediction unit predicts non-occurrence of the vehicle behavior using the probability distribution based on the traveling speed and predicts occurrence of the vehicle behavior using the probability distribution based on the acceleration. 32. The vehicle behavior prediction device according to claim 25, further comprising a distribution calculating unit, which obtains a plurality of kinds of probability distributions representing occurrence probability of vehicle behavior with respect to the at least one value that is input to the vehicle behavior prediction unit, wherein the distribution calculating unit further includes a reliability zone defining unit, which defines a predetermined zone from a center of the probability distribution representing an average value of the vehicle behavior as a reliability zone concerning occurrence probability of the vehicle behavior, and the vehicle behavior prediction unit predicts vehicle behavior of the prediction-subject vehicle using the probability distribution in the reliability zone. 33. The vehicle behavior prediction device according to claim 26, further comprising a distribution calculating unit, which obtains a plurality of kinds of probability distributions representing occurrence probability of vehicle behavior with respect to the at least one value that is input to the vehicle behavior prediction unit, wherein the distribution calculating unit further includes a reliability zone defining unit, which defines a predetermined zone from a center of the probability distribution representing an average value of the vehicle behavior as a reliability zone concerning occurrence probability of the vehicle behavior, and the vehicle behavior prediction unit determines whether vehicle behavior of the prediction-subject vehicle belongs to the probability distribution based on whether the vehicle behavior belongs to the reliability zone of the probability distributions. 34. The vehicle behavior prediction device according to claim 26, further comprising a distribution calculating unit, which obtains a plurality of kinds of probability distributions representing occurrence probability of vehicle behavior with respect to the at least one value that is input to the vehicle behavior prediction unit, wherein information concerning at least one of a traveling location of a vehicle and a characteristic of the traveling location is included in the traveling state information, the distribution calculating unit obtains the plurality of kinds of probability distributions for each of the traveling location or the characteristic of the traveling location, and when the vehicle behavior prediction unit predicts the vehicle behavior, the vehicle behavior prediction unit identifies a traveling location of the prediction-subject vehicle or a characteristic of the traveling location, and uses, for predicting the vehicle behavior, a plurality of kinds of probability distributions obtained by the distribution calculating unit concerning a traveling location or a characteristic of the traveling location that is common with the result of the identification. 35. The vehicle behavior prediction device according to claim 26, further comprising a distribution calculating unit, which obtains a plurality of kinds of probability distributions representing occurrence probability of vehicle behavior with respect to the at least one value that is input to the vehicle behavior prediction unit, wherein the traveling state information is acquired based on information sent from a plurality of vehicles each having a wireless communication function to a management center of a probe information communication system, at least one of the distribution calculating unit and the vehicle behavior prediction unit is provided in the management center, and information representing at least one of the probability distribution and a prediction result of vehicle behavior of the prediction-subject vehicle is provided from the management center as requested. 36. A driving assistance device for assisting a driving operation of a driver based on a prediction result of vehicle behavior, the driving assistance device including a driving assistance unit that predicts vehicle behavior of a vehicle to be assisted in the driving operation or a vehicle in front traveling in front of the vehicle in the traveling direction using the vehicle behavior prediction device, and executes driving assistance based on the predicted vehicle behavior, wherein the vehicle behavior prediction device predicts vehicle behavior based on traveling state information representing a traveling state of a vehicle, wherein the traveling state information includes at least one value of traveling speed of the vehicle and acceleration of the vehicle, the vehicle behavior prediction device includes a vehicle behavior prediction unit, which collects the traveling state information, inputs a plurality of kinds of probability distributions representing occurrence probability of vehicle behavior with respect to the at least one value obtained based on the collected traveling state information, and predicts vehicle behavior of a prediction-subject vehicle based on whether the at least one value concerning the prediction-subject vehicle belongs to one of the plurality of kinds of probability distributions, and it is determined whether the at least one value belongs to the probability distribution depending upon whether the at least one value is included in one continuous region in which occurrence probability in the probability distribution is greater than zero. 37. A vehicle behavior prediction method for predicting vehicle behavior based on traveling state information representing a traveling state of a vehicle using a vehicle behavior prediction device, wherein the traveling state information includes at least one of traveling speed of the vehicle and acceleration of the vehicle, the vehicle behavior prediction method comprising collecting the traveling state information; predicting vehicle behavior of a prediction-subject vehicle based on whether the at least one value concerning the prediction-subject vehicle belongs to one of a plurality of kinds of probability distributions using the plurality of kinds of probability distributions representing occurrence probability of vehicle behavior with respect to the at least one value obtained based on the collected traveling state information, and determining whether the at least one value belongs to the probability distribution depending upon whether the at least one value is included in one continuous region in which occurrence probability in the probability distribution is greater than zero. 38. The vehicle behavior prediction method according to claim 37, wherein a probability distribution at occurrence of specific vehicle behavior and a probability distribution at non-occurrence of the specific vehicle behavior are used as the plurality of kinds of probability distributions. 39. The vehicle behavior prediction method according to claim 38, wherein in the predicting of the vehicle behavior, when the at least one value belongs to the probability distribution at non-occurrence of the specific vehicle behavior and does not belong to the probability distribution at occurrence of the specific vehicle behavior, it is predicted that the prediction-subject vehicle will not exhibit corresponding vehicle behavior. 40. The vehicle behavior prediction method according to claim 38, wherein in the predicting of the vehicle behavior, when the at least one value does not belong to the probability distribution at non-occurrence of the specific vehicle behavior or belongs to both the probability distribution at non-occurrence of the specific vehicle behavior and the probability distribution at occurrence of the specific vehicle behavior, it is determined that it is indeterminable whether vehicle behavior of the prediction-subject vehicle will not be exhibited. 41. The vehicle behavior prediction method according to claim 38, wherein in the predicting of the vehicle behavior, when the at least one value belongs to the probability distribution at occurrence of the specific vehicle behavior and does not belong to the probability distribution at non-occurrence of the specific vehicle behavior, it is predicted that the prediction-subject vehicle will exhibit corresponding vehicle behavior. 42. The vehicle behavior prediction method according to claim 38, wherein in the predicting of the vehicle behavior, when the at least one value does not belong to the probability distribution at occurrence of the specific vehicle behavior or belongs to both the probability distribution at occurrence of the specific vehicle behavior and the probability distribution at non-occurrence of the specific vehicle behavior, it is determined that it is indeterminable whether the prediction-subject vehicle will exhibit corresponding vehicle behavior. 43. The vehicle behavior prediction method according to claim 38, wherein deceleration behavior of a vehicle is selected as the vehicle behavior, and in the predicting of the vehicle behavior, non-occurrence of the vehicle behavior is predicted using a probability distribution based on traveling speed, and occurrence of the vehicle behavior is predicted using a probability distribution based on acceleration. 44. The vehicle behavior prediction method according to claim 37, further comprising defining a predetermined zone from a center of the probability distribution representing an average value of the vehicle behavior as a reliability zone concerning occurrence probability of the vehicle behavior, wherein in the predicting of the vehicle behavior, the vehicle behavior is predicted using the probability distribution in the reliability zone as the probability distribution. 45. The vehicle behavior prediction method according to claim 38, further comprising defining a predetermined zone from a center of the probability distribution representing an average value of the vehicle behavior as a reliability zone concerning occurrence probability of the vehicle behavior, wherein in the predicting of the vehicle behavior, it is determined whether vehicle behavior of a prediction-subject vehicle belongs to the probability distribution based on whether the vehicle behavior belongs to the reliability zone of the probability distributions. 46. The vehicle behavior prediction method according to claim 37, wherein the vehicle behavior prediction method further comprising obtaining a plurality of kinds of probability distributions representing occurrence probability of the vehicle behavior used in the predicting, identifying an information representing at least one of a traveling location of a vehicle and a characteristic of the traveling location is selected as the traveling state information, in the obtaining of the distribution, the plurality of kinds of probability distributions are obtained for the traveling location or the characteristic of the traveling location, in the predicting of the vehicle behavior, the method further comprising identifying a traveling location of a prediction-subject vehicle or a characteristic of the traveling location, and selecting, from the probability distributions, a plurality of kinds of probability distributions concerning a traveling location or a characteristic of the traveling location that is common with an identifying result of the identifying, and the probability distributions selected is used for predicting the vehicle behavior.