Method and system for obtaining traffic information using transponders
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United States of America Patent
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N/A
Issued Date -
May 24, 2007
app pub date -
Nov 21, 2005
filing date -
Nov 21, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and system for obtaining traffic information regarding the travel time between two points using vehicle-mounted transponders. The system includes an upstream reader and a downstream reader. The upstream reader inserts a time stamp into a passing transponder. The downstream reader reads the time stamp and determines the travel time between the two readers. The downstream reader may accumulate a number of travel times from multiple transponders and calculate an average travel time. The downstream reader may then send the calculated travel time to a display sign for display to motorists. The displayed travel time may include a quantitative value or a qualitative assessment of the travel conditions.
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