Travel guidance system, travel guidance apparatus, travel guidance method, and computer program

A travel guidance apparatus comprising:

• a navigation-route setting unit that sets a navigation route along which a movable body is guided and a guidance junction on the navigation route;
• a junction acquiring unit that acquires a position of a preceding junction that is located closer to a departure place of the navigation route than the guidance junction;
• a guidance setting unit that sets guidance on the guidance junction;
• and
• a junction guiding unit that provides guidance on the guidance junction on the basis of the guidance set by the guidance setting unit, wherein
• the guidance setting unit sets the guidance such that the guidance includes a first phrase for specifying a positional relationship between the movable body and the preceding junction, a second phrase for specifying a positional relationship between the movable body and the guidance junction after the movable body has passed through the preceding junction, and a third phrase indicating a positional relationship between the moving body and the guidance junction before passing through the preceding junction,
• wherein the guidance setting unit determines whether the third phrase is suitable as guidance by determining if the third phrase can be started and finished within a predetermined timing, sets the third phrase as the guidance set, and if the third phrase is not suitable, the guidance setting sets the first phrase or the second phrase as the guidance set.

A travel guidance method comprising:

• setting a navigation route along which a movable body is guided and a guidance junction on the navigation route;
• acquiring a position of a preceding junction that is located closer to a departure place of the navigation route than the guidance junction;
• setting guidance on the guidance junction;
• and
• providing guidance on the guidance junction on the basis of the guidance set,
• wherein setting guidance, in cases where guidance on a guidance junction on a navigation route is provided using set guidance, includes a first phrase, a second phrase, and a third phrase for the guidance on the guidance junction, the first phrase specifying a positional relationship between a movable body and a preceding junction that is located closer to a departure place of the navigation route than the guidance junction, the second phrase specifying a positional relationship between the movable body and the guidance junction after the movable body has passed through the preceding junction, and the third phrase indicating a positional relationship between the moving body and the guidance junction before passing through the preceding junction,
• wherein setting the guidance includes determining whether the third phrase is suitable as guidance by determining if the third phrase can be started and finished within a predetermined timing, setting the third phrase as the guidance set, and if the third phrase is not suitable, setting the first phrase or the second phrase as the guidance set.

A computer program causing a computer to perform:

• A navigation-route setting function of setting a navigation route along which a movable body is guided and a guidance junction on the navigation route;
• A junction acquiring function of acquiring a position of a preceding junction that is located closer to a departure place of the navigation route than the guidance junction;
• a guidance setting function of setting guidance on the guidance junction;
• and
• a junction guiding function of providing guidance on the guidance junction on the basis of the guidance set by the guidance setting function, wherein
• the guidance setting function sets the guidance such that the guidance includes a first phrase for specifying a positional relationship between the movable body and the preceding junction, a second phrase for specifying a positional relationship between the movable body and the guidance junction after the movable body has passed through the preceding junction, and a third phrase indicating a positional relationship between the moving body and the guidance junction before passing through the preceding junction,
• wherein the guidance setting function determines whether the third phrase is suitable as guidance by determining if the third phrase can be started and finished within a predetermined timing, sets the third phrase as the guidance set, and if the third phrase is not suitable, the guidance setting sets the first phrase or the second phrase as the guidance set.