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LoRa-Based Traffic Flow Detection for Smart-Road.

David Asiain1, Diego Antolín1

  • 1Escuela Universitaria Politécnica de la Almunia, C/Mayor 5, La Almunia de Doña Godina, 50100 Zaragoza, Spain.

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Summary

A new wireless traffic flow detection system using Low Power Wide Area Network (LPWAN) technology accurately measures vehicle speed, especially in slow or stopped traffic conditions. This system enhances highway safety by providing reliable data for accident prevention.

Keywords:
LoRaLoRaWANSmartRoadhighway signalingtraffic flow

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Area of Science:

  • Engineering
  • Telecommunications
  • Transportation Systems

Background:

  • Highway traffic congestion, particularly slow or stopped conditions, significantly elevates accident risks.
  • Existing traffic monitoring systems may lack efficiency in detecting these specific low-speed scenarios.
  • Wireless sensor networks offer potential for cost-effective and adaptable traffic monitoring solutions.

Purpose of the Study:

  • To develop and validate a wireless traffic flow detection system for slow or stopped traffic conditions.
  • To assess the system's performance against a laser barrier reference system.
  • To analyze the relationship between signal attenuation (RSSI) and traffic parameters.

Main Methods:

  • Development of a Low Power Wide Area Network (LPWAN) based on LoRa, named Short LoRa, compliant with ETSI standards.
  • Integration of devices capable of operating on both Short LoRa and LoRaWAN networks.
  • Field testing and comparative analysis against a laser barrier system, with data analyzed using two distinct methods.

Main Results:

  • The developed system accurately determines vehicle speed, particularly at low speeds.
  • Analysis of Radio Signal Strength Indicator (RSSI) provided insights into signal attenuation behavior.
  • A correlation was established between vehicle speed, gate distances, and RSSI attenuation.

Conclusions:

  • The wireless traffic flow detection system demonstrates efficient and accurate performance in its intended application.
  • The system's ability to measure speed in slow traffic contributes to enhanced highway safety.
  • The study validates the use of LPWAN technology for real-time traffic monitoring and analysis.