Actuated digital pretimed traffic controller
US4449116A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1981 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | Dec 1, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a digital pretimed traffic controller of the type used to control traffic signals at an intersection during a selected signal cycle there is provided an improvement wherein a demand signal, such as created by a detector, is directed to the controller. The demand signal is used for selecting one of a plurality of interval sequences within a fixed time cycle background. In this manner, the digital pretimed controller is compatible with electro-mechanical controllers and still retains traffic actuation versatility. The controller also is constructed to assure that the overall cycle length and the programmable individual interval times are identical before the particular timing plan can be accepted by the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.