Estimating the proportion of non-fatality unreported traffic accidents in Malaysia

Nik Sarah Nik Zamri, Zamira Hasanah Zamzuri

Research output: Contribution to journalArticle

Abstract

Traffic accidents statistical analysis is important in understanding and estimating the occurrence of the event. However, traffic accident data often exhibit the occurrence of extra zeros, due to the underreporting scenario; in which the accidents are happened but not reported, mainly for non-fatality accidents. Hence, the aims of this paper are to gain insight into the accident reporting system and estimating the proportion of non-fatality unreported accidents in Malaysia. Two sets of data were considered in this study: the survey data and the police data. The data were divided according to the level of severity, which were serious and slight injury for survey data and police data in the year 2013-2015. The survey data collects information on both unreported and reported accidents based on the Malaysian drivers' experiences; whereas the police data is the reported accidents occurred in the year 2013-2015. Distributions considered in this study are normal, gamma, beta, and logistic were fitted to the proportion and the log of the proportion of unreported accidents in the survey data. We found that the proportion of unreported serious injury is 0.54 and the proportion of unreported slight injury is 0.58. We also estimated the proportion of unreported accidents per driver, using beta distribution, in which the estimate for the proportion of unreported serious injury is 0.8418 and the proportion of unreported slight injury is 0.8340.

Original languageEnglish
Pages (from-to)239-245
Number of pages7
JournalASM Science Journal
Volume12
Issue numberSpecial Issue 1
Publication statusPublished - 1 Jan 2019

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Highway accidents
Accidents
Law enforcement
Logistics
Statistical methods

Keywords

  • Distribution
  • Non-fatality
  • Proportion
  • Severity
  • Unreported accidents

ASJC Scopus subject areas

  • General

Cite this

Estimating the proportion of non-fatality unreported traffic accidents in Malaysia. / Zamri, Nik Sarah Nik; Zamzuri, Zamira Hasanah.

In: ASM Science Journal, Vol. 12, No. Special Issue 1, 01.01.2019, p. 239-245.

Research output: Contribution to journalArticle

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