Automated traffic mapping using sampling and analysis
US6333703A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2000 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Oct 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096844
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system of mobile units are installed in multiple vehicles in traffic, the vehicles with mobile units being a sample of all vehicles in traffic. These mobile units include both wireless communications devices and apparatus that determines the location of each vehicle. Monitoring a vehicle's position as a function of time also reveals the velocity of the vehicle. Position and speed information is periodically broadcast by the vehicles to a central monitoring station and to neighboring vehicles. At the central monitoring station, the collective input from the sample set of vehicles is processed using statistical analysis methods to provide an instant chart of traffic conditions in the area, the accuracy of said chart being within a range determined by the size of the sample. Warnings of delays or updates on traffic conditions on the road ahead are then automatically returned to subscribers of the information or are used as part of an Intelligent Vehicle Highway System (IVHS). Neighboring vehicles within a region communicating with one another form a network in which the broadcast information is processed locally on the respective vehicles to estimate possible problems ahead and cons…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.