Automatic determination of traffic signal preemption using GPS, apparatus and method
US5986575A · kind A · utility
168Cited by
5References
51Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Jul 15, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/41
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
For qualification for traffic preemption an area is defined and if the vehicle is in the area it can obtain preemption. The vehicle's position is determined, in one embodiment, by use of differential GPS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.