Path guide apparatus for vehicle

Abstract

Abstract PURPOSE:To select automatically starting and objective intersections and further, to set automatically the shortest path between these intersections by storing the positional coordinates and a classification for every intersection and storing the next attainable adjoining intersection or the like. CONSTITUTION:The titled apparatus is mainly constituted of a controller consisting of a CPU 1, a system ROM 2 and a RAM 3. Then, the positional coordinates and the classification for every intersection are stored and the correlation quantity between the next attainable adjoining intersection and the time required until then is stored in a basic information storage means. Further, a path end intersection retrieval means selects the neighboring intersection to the starting place as the starting intersection and further, the neighboring intersection to the destination as the objective intersection. Further, a path retrieval means retrieves the shortest path going from the starting intersection to the objective intersection under a prescribed condition. Then, a path correction means corrects the path to that not including a circular path part in case the road to return to the same interchange as the starting intersection after entering an express-way from the entrance intersection for the express-way which is the starting intersection is detected.

Inventors

• 👤 Okihiko Nakayama
• 👤 沖彦 中山
• 👤 Toshiyuki Ito
• 👤 敏行 伊藤
• 👤 Katsuhiko Mizushima
• 👤 水島　克彦
• 👤 Kazuhiko Yoshida
• 👤 和彦 吉田

Bibliographic Details