Effect of roadway geometrics and environmental factors on rural freeway accident frequencies

Venkataraman Shankar, Fred Mannering, Woodrow Barfield

Research output: Contribution to journalArticlepeer-review

509 Scopus citations


This paper explores the frequency of occurrence of highway accidents on the basis of a multivariate analysis of roadway geometrics (e.g. horizontal and vertical alignments), weather, and other seasonal effects. Based on accident data collected in the field, a negative binomial model of overall accident frequencies is estimated along with models of the frequency of specific accident types. Interactions between weather and geometric variables are proposed as part of the model specifications. The results of the analysis uncover important determinants of accident frequency. By studying the relationship between weather and geometric elements, this paper offers insight into potential measures to counter the adverse effects of weather on highway sections with challenging geometrics.

Original languageEnglish (US)
Pages (from-to)371-389
Number of pages19
JournalAccident Analysis and Prevention
Issue number3
StatePublished - Jun 1995

All Science Journal Classification (ASJC) codes

  • Human Factors and Ergonomics
  • Safety, Risk, Reliability and Quality
  • Public Health, Environmental and Occupational Health


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