Traffic preemption system with headway management
US7432826B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 2005 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Apr 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/123
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A traffic-preemption system and method that communicates an identification code from vehicles to a traffic location. Traffic light control equipment, such as a receiver and traffic light circuit at each intersection of a controlled area, is used to manage headway in mass-transit systems as well as to provide traffic light pre-emption for emergency vehicles. Each traffic light circuit in the controlled area has a receiver located at a traffic location and adapted to receive an identification code from a mass-transit vehicle. A decoding circuit responds to the received identification code by attempting to identify the mass-transit vehicle and determine the timing on the identified route that improves an identified vehicle's headway and/or route timing. In response to determining the timing, a traffic-preemption command is generated for a traffic light on the identified route.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.