Intersection warning system

Communications: electrical – Traffic control indicator – Plural intersections under common central station control

Patent

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Details

340901, 340902, 340903, 340904, 340905, 340435, 180167, 701117, 701301, G08G 107, G08G 116

Patent

active

059261145

ABSTRACT:
An intersection warning system includes a vehicle-side system provided in a vehicle, and a road-side system. The vehicle-side system includes a transmitting unit emitting a radar signal to a forward area of the vehicle, a receiving unit receiving a signal from the forward area of the vehicle, a reflected signal detecting unit determining whether the signal received by the receiving unit is a reflected signal of the radar signal emitted by the transmitting unit, and warning means for issuing a warning when the reflected signal detecting unit determines that the received signal is the reflected signal of the radar signal. The road-side system includes a signal return unit, provided for each of lanes intersecting each other at an intersection, receiving the radar signal from the vehicle approaching the intersection on each of the lanes and returning a virtual reflected signal toward the vehicle, a vehicle watching unit watching the lanes intersecting each other at the intersection and detecting a vehicle approaching the intersection, and a control means for activating the signal returning unit provided for at least one of the lanes when the vehicle watching unit detects vehicles approaching the intersection on the lanes intersecting each other.

REFERENCES:
patent: 5083125 (1992-01-01), Brown et al.
patent: 5214793 (1993-05-01), Conway et al.
patent: 5497148 (1996-03-01), Oliva
patent: 5572202 (1996-11-01), Regel et al.

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