Abstract
This article introduces fiber Bragg grating (FBG) system for monitoring selected traffic flow parameters in urban areas. The system is able to monitor traffic density or speed of cars driving in single lane. The proposed system consists of five Bragg gratings encapsulated in Polydimethylsiloxane polymer and is characterized by easy and inexpensive installation in the milled upper layer of the road covered with an asphalt mixture. The results of first operational tests presented in this study include 3978 passing vehicles of various specifications. The system’s vehicle detection success rate is 99.62%. And further, a mean absolute error 1.35 kph and a relative error 2.62% when measuring vehicle speed.
Highlights
Traffic sensors are devices that provide input data for traffic management systems
The basic information and traffic parameters provided by the sensors include vehicle speed, vehicle classification, wheelbase and number of axles, vehicle weight, axle load of the road, stopped vehicle detection, lane or direction change detection and traffic density, which indicates the quality of traffic flow
The traffic sensors are primarily divided into two basic groups, intrusive and non-intrusive
Summary
Traffic sensors are devices that provide input data for traffic management systems. These sensors are installed primarily on and above the roadway or within the road surface. The traffic sensors are primarily divided into two basic groups, intrusive and non-intrusive (i.e. destructive or non-destructive to the road and its surroundings). A. STATE-OF-THE-ART SENSORS The conventional traffic sensors include inductive loops [1], [2] and magnetic field sensors [3]. STATE-OF-THE-ART SENSORS The conventional traffic sensors include inductive loops [1], [2] and magnetic field sensors [3] These are among the most commonly used sensors for their simplicity and reliability
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