Speed related variables for crash injury risk analysis: what has been used?

Guilhermina Torrão*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Speed is a major risk factor in overall road safety performance. The objective of this study was to identify the most frequent explanatory variables and measures used to investigate the speed factor contribution to crash injury risk (CIR). For this purpose, a literature oriented approach was used. The analysis review, underpinned by data collected from 64 journal publications reported over the past 21 years shows that speed limit was the most frequently used variable selected by the authors to investigate speed contribution CIR. Following, speed delta-V was the second most used variable, despite the barriers to access in-depth crash quality data. Even so, the speed limit was used 3.5 times more than delta-V, possibly due to the facilitate accessibility to the roads standardize posted speed limits. However, it is unknown how much vehicles travel speed could deviate from the posted speed limit at the moment of the crash.
Original languageEnglish
Pages (from-to)1560-1567
JournalInternational Journal of Crashworthiness
Issue number5
Publication statusPublished - 19 Sept 2021

Bibliographical note

© 2021 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.


  • Crash
  • Injury
  • Risk
  • Speed
  • Variable
  • Vehicle


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