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The Cellular Network as a Sensor: From Mobile Phone Data to Real-Time Road Traffic Monitoring

Published: 25 September 2015 Publication History

Abstract

Mobile cellular networks can serve as ubiquitous sensors for physical mobility. We propose a method to infer vehicle travel times on highways and to detect road congestion in real-time, based solely on anonymized signaling data collected from a mobile cellular network. Most previous studies have considered data generated from mobile devices active in calls, namely Call Detail Records (CDR), an approach that limits the number of observable devices to a small fraction of the whole population. Our approach overcomes this drawback by exploiting the whole set of signaling events generated by both idle and active devices. While idle devices contribute with a large volume of spatially coarse-grained mobility data, active devices provide finer-grained spatial accuracy for a limited subset of devices. The combined use of data from idle and active devices improves congestion detection performance in terms of coverage, accuracy, and timeliness. We apply our method to real mobile signaling data obtained from an operational network during a one-month period on a sample highway segment in the proximity of a European city, and present an extensive validation study based on ground-truth obtained from a rich set of reference datasources - road sensor data, toll data, taxi floating car data, and radio broadcast messages.

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            Published In

            cover image IEEE Transactions on Intelligent Transportation Systems
            IEEE Transactions on Intelligent Transportation Systems  Volume 16, Issue 5
            Oct. 2015
            651 pages

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            IEEE Press

            Publication History

            Published: 25 September 2015

            Author Tags

            1. mobility sensor
            2. Cellular floating car data
            3. large mobility data sets
            4. travel time estimation
            5. road congestion detection

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