Traffic flow change monitoring system
US5281964A · kind A · utility
13Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1991 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Oct 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/0104
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A traffic flow change monitoring system is disclosed, which uses data obtained from a vehicle perceiving sensor placed on a road and which can detect a traffic congestion or an unexpected event. Since a change in traffic flow is monitored on the basis of the speeds or the like of individual vehicles and the distances between successive vehicles, it is possible to monitor a positional relationship between successively running vehicles Also, it is possible to make a prompt detection of an unexpected event such as an accident by detecting a change in relative vehicle speed difference between traffic lanes at each measurement spot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.