Route search and navigation apparatus and storage medium storing computer programs for navigation processing with travel difficulty by-pass
US6101443A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Apr 8, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096872
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present invention prevents execution of a detour route search, responsive to and in accordance with received VICS data, where certain conditions are not met. To this end, the system of the invention calculates a time RT1 required for a vehicle to move from its present location to a first point where the vehicle must turn to the right or left to follow a previously determined guidance route and also calculates a time CT required to conduct a route re-search based on the received VICS data. If RT1.ltoreq.CT the system then performs a route re-search based on the received VICS data. On the other hand, if RT1<CT execution of the route re-search is prohibited.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.