Title :
Real-Time Measurement of Link Vehicle Count and Travel Time in a Road Network
Author :
Kwong, Karric ; Kavaler, Robert ; Rajagopal, Ram ; Varaiya, Pravin
Author_Institution :
Sensys Networks, Inc., Berkeley, CA, USA
Abstract :
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.
Keywords :
real-time systems; statistical analysis; vehicles; matching algorithm; real-time measurement; road network link; single-lane road; statistical model; travel time; vehicle count; vehicle signature matching; wireless magnetic sensor network; Current measurement; Detectors; Magnetic sensors; Road vehicles; System testing; Time measurement; Traffic control; Velocity measurement; Volume measurement; Wireless sensor networks; Link vehicle count; magnetic sensors; signature matching; spatial occupancy; travel time; vehicle reidentification;
Journal_Title :
Intelligent Transportation Systems, IEEE Transactions on
DOI :
10.1109/TITS.2010.2050881
