Traffic information generation method, traffic information generation device, and navigation system
US8433504B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 22, 2008 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Jun 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/0969
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A traffic information generation method for generating traffic information for each link includes a vehicle speed detection step of detecting a vehicle speed at predetermined distance intervals or at predetermined time intervals using a vehicle speed sensor; and a traffic jam degree detection step of referring to a specified speed and a specified distance prescribed in association with a traffic jam degree representing a level of a traffic jam and a connection determination distance prescribed in accordance with a road type to detect the traffic jam degree corresponding to the vehicle speed. When a link length falls within a predetermined range, information on the traffic jam degree corresponding to a fastest vehicle speed within a prescribed starting point distance from a beginning of the link is allocated to the link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.