Evaluation of the Data Accuracy of Loop Detector in Adaptive Signal Control Systems
Subject Areas : Information Technology in Engineering Design (ITED) Journal
Keywords:
Abstract :
Abstract Inductive loop detectors are widely used on highways, streets and intersections in many countries. They are proven technologies for traffic count, but high error rates can affect their data quality. Accurate real-time knowledge of traffic volume is a critical issue in adaptive signal control systems. The aim of this research is to evaluate the data accuracy of inductive loop detectors installed in adaptive signalized intersections equipped with SCATS in Mashhad, Iran. This study also aims to understand the relationship between error ratios of loop detectors and traffic volume. Results theorize a parabolic relationship but its exact calibration of it depends upon prevailing conditions, which vary from location to location and even over time at the same locations. It is confirmed that traffic composition affects the data accuracy of loop detectors. The research reported in this paper also addresses the most common reasons for improper operation of inductive loop detectors in Mashhad’s signalized intersections; this is highly related to the driver’s behavior.
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