Dynamic timing adjustment in an electronic toll collection system
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United States of America Patent
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Jun 10, 2008
Grant Date -
Jan 11, 2007
app pub date -
Jul 7, 2005
filing date -
Jul 7, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
An electronic toll collection system with dynamically adjusted timing for operation of one or more subsystems. The timing is dynamically adjusted based upon the prevailing traffic speed for the roadway. The roadway traffic speed is determined based upon direct measurements of traffic speed by external equipment or based upon a variable correlated with traffic speed. The variable may include the average number of handshakes per transponder over an estimation period. The subsystem may include a vehicle position determination system, an enforcement system, a loop detection system, or other such subsystems.
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