A navigation apparatus and method that store route information, the stored
route information including, for each of a plurality of routes starting
at a first point and ending at a second point, a required travel time and
a traffic condition. The apparatus and method determine whether a
guidance route includes the first point and the second point of a stored
route. The apparatus and method read out, if a guidance route includes
the first point and the second point of a stored route, the stored route
information for the stored route that shares the first point and the
second point with the guidance route. The read out stored route
information having a same or similar traffic condition as a current
traffic condition. The apparatus and method output the required time to
travel the stored route from the read route information.