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MAC Address Sensing for Multi-modal Data Collection
University of Washington STAR Lab
July 17th, 2015
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Mobile Device Detection
Devices that are equipped with Bluetooth or Wi-Fi have a unique MAC address MAC address only broadcasted if device is
“discoverable
Detectors scan all Bluetooth or Wi-Fi frequencies for devices
Portable, inexpensive
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Previous Applications
Vehicle Travel Times Pedestrian Travel Times and Routes Wait Times at Bus Stops
Many Future Possibilities!
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Current Application: Determining Bus Ridership and O-D Information
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Project Description
What Did We Do? Installed Bluetooth and Wi-Fi Sensors on 10
university transit vehicles Installed static sensors at 4 stops Bus Data collected from 4/27/2015 -> 6/08/2015 Multiple non-continuous days of static data
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Project Description
Onboard Sensor
Static Sensor at Bus stop
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Project Description
eUWTS transit routes (UWTS, 2015)
a) South Lake Union Shuttle b) Health Science Express
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Data
Raw Bluetooth detections onboard Bus #592
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Data
Bluetooth data origins and destinations
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Results: About 1 in 5 Detected
0
50
100
150
200
250
300
350
Actual Passenger Counts
Detected Bluetooth Devices
Actual vs. Detected Passengers
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Estimated OD Matrices
Is This the Actual O/D Matrix?
Estimated OD matrix from Wi-Fi detections
Estimated OD matrix from Bluetooth detections