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On Measuring Traffic with Bluetooth and Wi-Fi Setup and Results Jan Schulz

On Measuring Traffic with Bluetooth and Wi-Fi Setup and Results Jan Schulz. Urban Traffic Research Laboratory (UTRaLab). 17 200 cars per day Total of 6,3 Mio. Cars per year 65 Mio. sets of loop-data per year. G 1. G 2. Setup. Detection devices on two gantries

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On Measuring Traffic with Bluetooth and Wi-Fi Setup and Results Jan Schulz

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  1. On Measuring Traffic with Bluetooth and Wi-FiSetup and ResultsJan Schulz

  2. Urban Traffic Research Laboratory (UTRaLab) • 17200 cars per day • Total of 6,3 Mio. Cars per year • 65 Mio. sets of loop-data per year G 1 G 2

  3. Setup • Detection devices on two gantries • Mini PCs with off-the-shelf Bluetooth and Wi-Fi Hardware • Bluetooth class 2 devices • Detection of Wi-Fi devices using a passive scanner • Omnidirectional antennas • Inductive loops serve as reference

  4. Wi-Fi Results • Measurement data of a week in February 2011

  5. Wi-Fi Results • Zoom in on a single day

  6. Bluetooth Results • Zoom in on a single day

  7. Wi-Fi vs. Bluetooth • Detection rate of Bluetooth is far higher than Wi-Fi

  8. Conclusion and Outlook • Wi-Fi measurements are not able to give reliable mean speeds yet • Traffic jams can be detected by the Wi-Fi approach • Higher Wi-Fi equipment rates for cars are needed to achieve better results • Combination of Bluetooth and Wi-Fi measurements should make results more robust • Outlook: • Overall setup has to be improved by introducing RSSI values • Wi-Fi setup has to be improved by means of antenna setup • Evaluating data fusion of Bluetooth, Wi-Fi and TPMS approach

  9. Thank you for your attention.

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