Railroad crossing signal apparatus
US6683540B1 · kind B1 · utility
17Cited by
2References
10Claims
0Family size
Inventor
Key dates
| Filing date | May 7, 2002 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | May 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/095
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A traffic warning system which alerts approaching vehicle traffic to the approach of a train in a crossing. The system includes a plurality of surface mounted lights partially embedded in and placed across a roadway. Once activated, the flashing lights warn drivers of approaching vehicles that the train is approaching, and that caution should be exercised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.