Using classification and regression tree and dimension reduction in analyzing motor vehicle traffic accidents

Yu Huei Liu, Kuang Yang Kou, Hsin-Hung Wu, Ya Chi Nian

Research output: Contribution to journalArticle

2 Citations (Scopus)


This study applies classification and regression tree (CRT) to identify the hidden knowledge in fatal accidents of motor vehicles from Fatal Traffic Accident of National Police Agency, Taiwan. In the beginning, twenty four variables are chosen from Fatal Traffic Accident data set. Later, dimension reduction is used to reduce the number of variables from twenty four to nine variables by principal component analysis. With two different CRT models with twenty four and nine variables to forecast injury severity, a comparison is made in terms of rules generated, model accuracy, type I and type II errors, and evaluation chart generated by IBM SPSS Modeler 14.2. The results show that the CRT model with dimension reduction outperforms the CRT model without dimension reduction almost in every category except for type II error since this model tends to slightly overestimate the injury severity of motor vehicle traffic accidents than the model without dimension reduction.

Original languageEnglish
Pages (from-to)639-646
Number of pages8
JournalApplied Mathematics and Information Sciences
Issue number2
Publication statusPublished - 2016 Jan 1


All Science Journal Classification (ASJC) codes

  • Analysis
  • Numerical Analysis
  • Computer Science Applications
  • Computational Theory and Mathematics
  • Applied Mathematics

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