Abstract: A map data update system includes a first storage portion that stores road network data that describes a road in terms of a connection relationship between a node and a link; an update portion that receives update data and updates the road network data based on the update data; a data obtaining portion that obtains additional data by a means that differs from a means that receives the update data; a second storage portion that stores the additional data including association information that indicates association between the additional data and the link; and a correcting portion that, when update processing of the road network data is executed by the update portion, the association information in the additional data that is associated with the link that is changed by the update processing.

Abstract: Driving support systems, methods, and programs detect an operation of a vehicle that is determined as dangerous driving, determine whether the detected operation is an avoidance operation to avoid a factor to be avoided in the vicinity of the vehicle, and obtain information related to an operation accompanying the detected operation when the detected operation is determined to be the avoidance operation. The systems, methods, and programs determine whether the detected operation is an appropriate avoidance operation based on the obtained information, and determine that the detected operation is not dangerous driving when the detected operation is determined to be the appropriate avoidance operation.