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Traffic Sensing Through Accelerometers
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DOI：10.1109/TVT.2015.2448237.png)
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With the advances in wireless communication and mobile computing, a future infrastructureless self-organizing traffic information system, where vehicles can form a network for exchanging traffic information among themselves, will soon be realized. In an infrastructureless traffic information system, vehicles will act as mobile sensors and collect the traffic data as they travel. Smartphones are a great choice for traffic sensing devices as they are now equipped with a variety of sensors such as global positioning system (GPS) receivers, accelerometers, gyroscopes, cameras, and microphones. These sensors can be exploited to collect traffic data. Although there are many types of sensors available for traffic sensing, past studies have mainly focused on a GPS receiver. However, a GPS receiver consumes a lot of power; hence, it can significantly shorten the battery life. In this paper, we explore a possibility of using other types of sensors on a smartphone for traffic sensing. In particular, we investigate whether it is possible and how accurate it is to estimate the average speed of a vehicle from the data sensed by an accelerometer. Two estimation methods will be introduced, and their accuracy will be evaluated.
Keyword:
Accelerometers
speed estimation
traffic information systems
traffic sensing
vehicular networks
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7.1
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1.8W
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6.6W
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