Traffic management system
US5337082A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Dec 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/91
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of and apparatus for providing information which may be used in making traffic management decisions for limited access highways is disclosed. The method and apparatus employs microwave radar to obtain information bearing signals which are processed to determine the vehicle direction and speed. The apparatus includes the capability of emulating in-the-road or on-the-road sensors to provide output pulse pairs which appear as if generated by switch closures. The method and apparatus also has the capability of providing "wake-up" signals commensurate with a predetermined number of consecutive vehicles which pass a preselected point traveling at an abnormally low speed. Because the method and apparatus are vehicle direction sensitive, the capability of monitoring traffic flow by looking across lanes is also present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.