Data processing: vehicles – navigation – and relative location – Navigation – Employing position determining equipment
Patent
1996-12-19
1999-10-26
Cuchlinski, Jr., William A.
Data processing: vehicles, navigation, and relative location
Navigation
Employing position determining equipment
701211, 701201, G06F16500
Patent
active
059743573
ABSTRACT:
A vehicle navigation system for indication of the current vehicle position provides improved guidance to the driver when he is exiting from a freeway onto a freeway connector road segment (a freeway bifurcation), with the destination being a street (non-freeway road segment) linked to the freeway connector. In this case there is a possibility that the displayed sign text data at the first decision point upon exiting from the freeway does not correspond closely enough to the actual freeway signs, which tend to emphasize the connecting freeways rather than the street. This would tend to confuse the driver. Therefore, before the vehicle passes through the first decision point upon exiting the freeway, the sign text data for the freeway connector segment of the segment prior to the last freeway connector segment connecting to the destination street is displayed at the first guidance point, and not just the destination street. After the vehicle passes the first decision point on the freeway connector, if the sign text data for the last freeway connector segment on that set of freeway connectors is included in the sign text data for the freeway connector segment of one segment before the last road segment, the last sign text data is displayed; if not, the sign text data for the freeway connector segment of one segment before the last is displayed. Hence, the system reliably displays data indicating the freeway bifurcation onto which the driver wants to turn.
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Ohashi Mikio
Poonsaengsathit Roderick A.
Alpine Electronics
Cuchlinski Jr. William A.
Donnelly Arthur D.
Honda Giken Kogyo Kabushiki Kaisha
Klivans Norman R.
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