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Real-Time Measurement of Link Vehicle Count and Travel Time in a Road Network

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4 Author(s)
Karric Kwong ; Sensys Networks, Inc., Berkeley, CA, USA ; Robert Kavaler ; Ram Rajagopal ; Pravin Varaiya

A system is described that measures the vehicle count and travel time in the links of a road network. The measurements require matching vehicle signatures recorded by a wireless magnetic sensor network. The matching algorithm is based on a statistical model of the signatures. The model itself is estimated from the data. The approach is first discussed for a single-lane road and extended to multiple-lane roads. The algorithm yields a correct matching rate of 75% for a false matching rate of 5% and reliably estimates the number of vehicles on each link and its travel-time distribution. The system is tested on a 0.9-mi-long segment of San Pablo Avenue, Albany, CA.

Published in:

IEEE Transactions on Intelligent Transportation Systems  (Volume:11 ,  Issue: 4 )