Selection of significant On-road sensor data for short-term traffic flow forecasting using the Taguchi method

Kit Yan Chan, Saghar Khadem, Tharam S. Dillon, Vasile Palade, Jaipal Singh, Elizabeth Chang

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Over the past two decades, neural networks have been applied to develop short-term traffic flow predictors. The past traffic flow data, captured by on-road sensors, is used as input patterns of neural networks to forecast future traffic flow conditions. The amount of input patterns captured by the on-road sensors is usually huge, but not all input patterns are useful when trying to predict the future traffic flow. The inclusion of useless input patterns is not effective to developing neural network models. Therefore, the selection of appropriate input patterns, which are significant for short-term traffic flow forecasting, is essential. This can be conducted by setting an appropriate configuration of input nodes of the neural network; however, this is usually conducted by trial and error. In this paper, the Taguchi method, which is a robust and systematic optimization approach for designing reliable and high-quality models, is proposed for the purpose of determining an appropriate neural network configuration, in terms of input nodes, in order to capture useful input patterns for traffic flow forecasting. The effectiveness of the Taguchi method is demonstrated by a case study, which aims to develop a short-term traffic flow predictor based on past traffic flow data captured by on-road sensors located on a Western Australia freeway. Three advantages of using the Taguchi method were demonstrated: 1) short-term traffic flow predictors with high accuracy can be designed; 2) the development time for short-term traffic flow predictors is reasonable; and 3) the accuracy of short-term traffic flow predictors is robust with respect to the initial settings of the neural network parameters during the learning phase.

Original languageEnglish
Article number6099612
Pages (from-to)255-266
Number of pages12
JournalIEEE Transactions on Industrial Informatics
Volume8
Issue number2
DOIs
Publication statusPublished - May 2012
Externally publishedYes

Keywords

  • Input patterns
  • neural network configuration
  • neural networks
  • sensor data
  • Taguchi method
  • traffic flow forecasting

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Electrical and Electronic Engineering

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