| 摘要 |
PROBLEM TO BE SOLVED: To obtain a route guidance apparatus in which a driver can be guided in such a way that, when a withdrawal route is guided regarding a traffic circle, it matches the sensor of the driver and that the driver can be withdrawn from a proper withdrawal route. SOLUTION: When a driver comes in from a link L9 so as to withdraw from a link L14, the order of the link L14 out of outside withdrawal routes is counted. That is to say, when a link L17 which is withdrawn to the inside of a traffic circle from a node N3 is considered, the link L14 is strictly a fourth succeeding withdrawl route. However, when only links which are withdrawn to the outside of the traffic circle are counted, the link L14 is a thirdly succeeding withdrawal route. In the traffic circle, only a withdrawal route to the outside is set mostly, and a driver is mostly conscious that a withdrawal route is directed to the outside. Consequently, when the driver is guided in such a way that he is to be withdrawn from a thirdly succeeding withdrawal route, he can be guided so as to match his sense. |
