Image processing device, image processing method and storage medium for storing programs for executing image process cycles

Travel historical data corresponding with each course are pre-prepared in accordance with the course type of the branch-point transition at the branching point. The course selected by the operator is discriminated in real time in the area of the branching point, either set of travel historical data is read, and the travel historical data is made to continue on from the previous travel historical data, whereby the ghost car image is displayed. Therefore, the ghost car image can always be made to travel together with the player moving body in accordance with the course arbitrarily selected by the operator.