1. A traffic simulator, comprising: a setting portion that, when a vehicle model, which is a model of a vehicle, is virtually driven on a road and traffic conditions are simulated, sets ability information representing abilities related to the driving of a driver of a vehicle model; a storage portion that stores space arrangement data representing the arrangement of the vehicle model in a virtual road space; a searching portion that searches the road space, which is represented by the space arrangement data stored in the storage portion, for cautionary objects that should be heeded by the driver when driving the vehicle model; a selection portion that selects cautionary objects recognized by the driver from the cautionary objects found by the searching portion, based on ability information of the driver set by the setting portion; and a determination portion that determines the movement of the vehicle model based on the cautionary objects selected by the selection portion.