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Title	Low-Cost Traffic Sensing System Based On Lorawan For Urban Areas
ID_Doc	35738
Authors	Pasandi H.B.; Haqiqat A.; Moradbeikie A.; Keshavarz A.; Rostami H.; Paiva S.; Lopes S.I.
Year	2022
Published	EmergingWireless 2022 - Proceedings of the 1st International Workshop on Emerging Topics in Wireless, Part of CoNEXT 2022
DOI	http://dx.doi.org/10.1145/3565474.3569069
Abstract	The advent of Low Power Wide Area Networks (LPWAN) has enabled the feasibility of wireless sensor networks for environmental traffic sensing across urban areas. In this study, we explore the usage of LoRaWAN end nodes as traffic sensing sensors to offer a practical traffic management solution. The monitored Received Signal Strength Indicator (RSSI) factor is reported and used in the gateways to assess the traffic of the environment. Our technique utilizes LoRaWAN as a long-range communication technology to provide a large-scale system. In this work, we present a method of using LoRaWAN devices to estimate traffic flows. LoRaWAN end devices then transmit their packets to different gateways. Their RSSI will be affected by the number of cars present on the roadway. We used SVM and clustering methods to classify the approximate number of cars present. This paper details our experiences with the design and real implementation of this system across an area that stretches for miles in urban scenarios. We continuously measured and reported RSSI at different gateways for weeks. Results have shown that if a LoRaWAN end node is placed in an optimal position, up to 96% of correct environment traffic level detection can be obtained. Additionally, we share the lessons learned from such a deployment for traffic sensing. © 2022 ACM.
Author Keywords	LoRaWAN; RSSI; smart cities; traffic sensing

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