Vehicular direction guidance system, particularly for interchang

Details Vehicular direction guidance system, particularly for interchang Vehicular direction guidance system, particularly for interchang

1977-07-12

1981-02-17

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

340 23, 340152T, 375 62, G08G 100, G08C 2100

Patent

active

042517974

ABSTRACT:
A circuit is provided to detect the direction of movement of the vehicle with respect to a fixed road mounted loop, which can then extend over opposing lanes of a highway network, the direction detecting equipment being mounted either on the vehicle, or connected to the road mounted unit so that correct destination guidance information can be transmitted to vehicles passing a loop embedded in the roadway upon transmitting from the vehicle to the roadway a target or destination code.

REFERENCES:
patent: 3859624 (1975-01-01), Kriofsky
patent: 3996555 (1976-12-01), Dow
patent: 4041448 (1977-08-01), Noens
patent: 4068211 (1978-01-01), Van Tol
patent: 4083008 (1978-04-01), Eschke

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