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Automated pedestrian counter : final report, February 2010.

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  • Abstract:
    Emerging sensor technologies accelerated the shift toward automatic pedestrian counting methods to

    acquire reliable long-term data for transportation design, planning, and safety studies. Although a

    number of commercial pedestrian sensors are available, their accuracy under different pedestrian

    traffic flow conditions is still questionable. Moreover, it is difficult to assess the suitability of different

    sensors for different locations. Some sensors claimed to be more accurate are substantially more

    expensive. Ease of deployment, power requirements, and long-term deployment issues all play an

    important role in the selection of sensors. This study attempts to shed light on the understanding of

    field performance of two commercially available automatic pedestrian sensors by performing rigorous

    comparisons—namely, a passive infrared counter by EcoCounter and a thermal sensor by TrafSys. A

    major innovation of this study was to simultaneously deploy the two relatively different sensor

    technologies—thermal and infrared sensors—under the same experimental conditions to compare

    their performances. To achieve this in a statistically robust manner, pairwise tests were conducted at

    trails and intersections with different pedestrian flow levels and characteristics. Statistically significant

    differences in terms of accuracy were found. The thermal sensor was found to produce less error

    than EcoCounter, which significantly undercounted pedestrians at intersections. This result was

    expected since EcoCounter is recommended for trail settings. The results also demonstrated the

    variability of both sensors given different deployment conditions. A calibration procedure for the

    EcoCounter data was also presented.

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File Language:
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