Communications: electrical – Vehicle detectors
Reexamination Certificate
2007-03-06
2007-03-06
Nguyen, Hung (Department: 2612)
Communications: electrical
Vehicle detectors
C340S936000, C340S940000, C340S941000, C340S988000
Reexamination Certificate
active
10490069
ABSTRACT:
A method of assessing the accuracy of a roadside traffic monitoring system (TMS) arranged to measure the speed and/or other parameters of vehicles passing a predetermined measurement point adjacent the TMS is disclosed. The method includes measuring the speed of each vehicle passing the measurement point using the TMS, measuring the moment in time that each vehicle passes the measurement point using the TMS, and recording the measured speeds and times as data pairs. The method further includes driving an Instrumented Probe Vehicle (IPV) at the measurement point, the IPV having an onboard system for measuring speed, determining the location of the IPV, determining a calibration time at which the determined location of the IPV corresponds to the location of the measurement point, and measuring a calibration speed of the IPV using the onboard system when the determined location of the IPV corresponds to the location of the measurement point.
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Blakely , Sokoloff, Taylor & Zafman LLP
Golden River Traffic Limited
Nguyen Hung
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