Railroad grade crossing motorist warning system

Details Railroad grade crossing motorist warning system Railroad grade crossing motorist warning system

1987-08-24

1990-07-17

Crosland, Donnie L.

Communications: electrical

Traffic control indicator

49 25, 49 49, 246125, 246126, 246127, 2464731, G08G 1095

Patent

active

049423959

ABSTRACT:
A three-piece, compact wireless railroad grade crossing motorist warning device comprising: a locomotive mounted transceiver which simultaneously communicates (upon close proximity) with a similar transceiver mounted at railroad grade crossing, and motor vehicles equipped with sympathetic receivers. Upon signal receipt verification, the grade crossing transceiver emits a coded radio signal to local motoring public sympathetic receivers. Upon signal reception, an audio/visual alert is presented to the motor vehicle operator, alerting the motor vehicle operator to the locomotive-occupied railroad crossing. Additionally, a contact verification display is displayed to the operator of the locomotive, upon activation of the grade site transceiver.

REFERENCES:
patent: 3758775 (1973-09-01), Hopkins
patent: 3854119 (1974-12-01), Friedman et al.
patent: 4093161 (1978-06-01), Auer, Jr.
patent: 4108405 (1978-08-01), Gibson
patent: 4238778 (1980-12-01), Ohsumi
patent: 4621252 (1986-11-01), Johns et al.

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