Electronically controlled safety mechanism for highway exit ramp

Details Electronically controlled safety mechanism for highway exit ramp Electronically controlled safety mechanism for highway exit ramp

1980-07-22

1982-03-16

Robinson, Thomas A.

Communications: electrical

Selective

Having indication or alarm

340 31R, 49 49, E01F 1300, G08G 100

Patent

active

043203809

ABSTRACT:
An electrically controlled safety mechanism for a highway exit ramp for detecting vehicle movement in the wrong direction, including a series of electrically controlled detection devices provided within the roadway, a warning member and support housing for the mechanism located adjacent to the roadway, and some distance beyond the road bed located detection devices, the warning member of the housing being pivotally mounted with respect to its base and capable of disposition in a nonoperative vertical position, but pivotal into a horizontal position when the detection devices sense the presence of a vehicle traveling in the wrong direction, a motor, brake, and speed reducer associated with the housing, for operation of the warning member, and for initiating its pivotal movements, the circuitry of this device including time operative electrical relay and electrical controller relays connected together for providing timed operations to the said motor and related mechanisms, so that the warning member will be conveniently pivoted into its operative and vehicle impeding position when a wrong way vehicle has been detected, and remain in such position for a segment of time, and then returned to its upright position after the hazardous condition has theoretically been alleviated.

REFERENCES:
patent: 3325782 (1967-06-01), Der
patent: 3587012 (1971-06-01), Piekarski
patent: 3626638 (1971-12-01), Lafferty
patent: 3876973 (1975-04-01), Griebel
patent: 4133140 (1979-01-01), Berard et al.

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