Car navigation method using statistical information from traffic information center

A navi-server (107) which is provided with information from a traffic information providing center, and presents and provides information made on the information to a terminal (122) is characterized by being equipped with a first storage means storing the information provided from the traffic information providing center; a traffic jam statistical making means (121) which makes traffic jam statistical information including traffic jam information in a predetermined point and a predetermined zone as well as a reliability of the traffic jam information, based on information stored in the first storage means; and a second storage means storing information made by the traffic jam statistical making means, wherein the navi-server presents and provides the information stored in the second storage means to the terminal, based on a request of the terminal and at a predetermined timing.