| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation device that enables group travel even without a dedicated communication device. SOLUTION: Vehicles 1 to 3 travel in a group. A cellphone 12 is connected to the navigation device 11 of the vehicle 1. When cellphones 21 and 31 are registered as delivery targets in the navigation device 11, the navigation device 11 E-mails guide information necessary for the group travel (for example, intersection right/left turn information and congestion information) to the registered delivery targets through the cellphone 12. Even without dedicated communication devices, the cellphones can be used for group travel. |
