A Traficam video vehicle detector was installed adjacent to a standard SCOOT inductive loop detector in Winchester. Outputs from the two detectors were returned to SCOOT and recorded for analysis. The inductive loop output was used in the SCOOT control algorithms as normal, but the trial Traficam detector was ignored by them. The status of both detectors, off or on, each quarter second was output in standard SCOOT messages and compared. The comparison was complicated as it was necessary to define the Traficam detection zone slightly downstream of that of the loop, but it was possible to make valid comparisons.

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