Method and system for avoiding a collision at an intersection an

Details Method and system for avoiding a collision at an intersection an Method and system for avoiding a collision at an intersection an

1998-07-31

2000-04-11

Tong, Nina

Communications: electrical

Traffic control indicator

Combined

340904, 340907, 340918, 340919, 235380, 235384, G08G 100

Patent

active

060492953

ABSTRACT:
Vehicles are prevented from colliding with each other at an intersection provided with no traffic light or having an obstructed view. A road-side apparatus is provided in the intersection and a on-board apparatus is provided on a vehicle. The on-board apparatus communicable with the road-side apparatus via a wireless packet communication. An empty wireless packet is periodically transmitted from the road-side apparatus in each of directions corresponding to roads extending from the intersection. The on-board apparatus returns a returning wireless packet to the road-side apparatus by providing a vehicle ID code to the empty wireless packet. A wireless packet including the vehicle ID code of one of the vehicle is transmitted to each of the directions corresponding to the roads when the one of the vehicle is determined to be provided with permission for entering the intersection. The onboard apparatus determines whether or not the vehicle ID code included in the received returning wireless packet matches its own vehicle ID code. An instruction of permission for entering the intersection is provided to a driver of the vehicle when the vehicle ID code included in the received returning wireless packet matches the vehicle ID code of the vehicle.

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