Navigation system

A navigation system 100 includes: a storage means 140 for having stored therein roadmap data, first statistical traffic information data pertaining to a first area which are created based upon a first standard related to a time applicable to the first area M10, and second statistical traffic information data pertaining to a second area M20 which are created based upon a second standard related to a time applicable to the second area M20; a search means for searching for a recommended route; and an estimated time of arrival calculation means for calculating an estimated time of arrival based upon the roadmap data, the first statistical traffic information data and the second statistical traffic information data. The estimated time of arrival calculation means executes calculation processing of the estimated time of arrival in compliance with the first standard and the second standard.