Traffic information warning system

Details Traffic information warning system Traffic information warning system

1994-08-30

1996-03-05

Swarthout, Brent A.

Communications: electrical

External condition vehicle-mounted indicator or alarm

Highway information

340902, 340903, 340904, 340906, 455 341, 455 342, 455 59, G08G 109

Patent

active

054971489

ABSTRACT:
A traffic information warning system for conveying traffic information from a traffic advisory site to a vehicle is disclosed. The traffic warning site comprises an emergency vehicle, a roadside hazard, or the like. The system comprises a transmitter adapted for placement at the advisory site and a receiver adapted for placement at the vehicle. The transmitter includes a first oscillator for transmitting a first unmodulated carrier signal at a first frequency and a second oscillator for transmitting a second unmodulated carrier signal at a second frequency. The first and second frequencies define the traffic information. The receiver includes a detector for detecting the first and second signals and an announcing device for announcing the traffic information.

REFERENCES:
patent: 3673560 (1972-06-01), Barsh et al.
patent: 3772641 (1973-11-01), Grosser et al.
patent: 3784970 (1974-01-01), Simpkin
patent: 4216545 (1980-08-01), Flickshu et al.
patent: 4443790 (1984-04-01), Bishop
patent: 4794394 (1988-12-01), Halstead
patent: 5091906 (1992-02-01), Reed et al.
patent: 5235329 (1993-08-01), Jackson
patent: 5307060 (1994-04-01), Prevulsky et al.

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