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In search of the severity dimension of traffic events: Extended Delta-V as a traffic conflict indicator

Laureshyn, Aliaksei LU ; De Ceunynck, Tim; Karlsson, Christoffer; Svensson, Åse LU and Daniels, Stijn (2017) In Accident Analysis & Prevention 98. p.46-56
Abstract
Most existing traffic conflict indicators do not sufficiently take into account the severity of the injuries resulting from a collision had it occurred. Thus far, most of the indicators that have been developed express the severity of a traffic encounter as their proximity to a collision in terms of time or space.

This paper presents the theoretical framework and the first implementation of Extended Delta-V as a measure of traffic conflict severity in site-based observations. It is derived from the concept of Delta-V as it is applied in crash reconstructions, which refers to the change of velocity experienced by a road user during a crash. The concept of Delta-V is recognised as an important predictor of crash outcome... (More)
Most existing traffic conflict indicators do not sufficiently take into account the severity of the injuries resulting from a collision had it occurred. Thus far, most of the indicators that have been developed express the severity of a traffic encounter as their proximity to a collision in terms of time or space.

This paper presents the theoretical framework and the first implementation of Extended Delta-V as a measure of traffic conflict severity in site-based observations. It is derived from the concept of Delta-V as it is applied in crash reconstructions, which refers to the change of velocity experienced by a road user during a crash. The concept of Delta-V is recognised as an important predictor of crash outcome severity.

The paper explains how the measure is operationalised within the context of traffic conflict observations. The Extended Delta-V traffic conflict measure integrates the proximity to a crash as well as the outcome severity in the event a crash would have taken place, which are both important dimensions in defining the severity of a traffic event. The results from a case study are presented in which a number of traffic conflict indicators are calculated for interactions between left turning vehicles and vehicles driving straight through a signalised intersection. The results suggest that the Extended Delta-V indicator seems to perform well at selecting the most severe traffic events. The paper discusses how the indicator overcomes a number of limitations of traditional measures of conflict severity. While this is a promising first step towards operationalising an improved measure of traffic conflict severity, additional research is needed to further develop and validate the indicator. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Accident Analysis & Prevention
volume
98
pages
46 - 56
publisher
Elsevier
external identifiers
  • scopus:84988811396
  • wos:000390965500005
ISSN
1879-2057
DOI
10.1016/j.aap.2016.09.026
language
English
LU publication?
yes
id
57b741cf-7fc2-40c1-b378-7f688da36920
date added to LUP
2016-10-11 17:49:43
date last changed
2018-10-07 04:47:33
@article{57b741cf-7fc2-40c1-b378-7f688da36920,
  abstract     = {Most existing traffic conflict indicators do not sufficiently take into account the severity of the injuries resulting from a collision had it occurred. Thus far, most of the indicators that have been developed express the severity of a traffic encounter as their proximity to a collision in terms of time or space.<br/><br/>This paper presents the theoretical framework and the first implementation of Extended Delta-V as a measure of traffic conflict severity in site-based observations. It is derived from the concept of Delta-V as it is applied in crash reconstructions, which refers to the change of velocity experienced by a road user during a crash. The concept of Delta-V is recognised as an important predictor of crash outcome severity.<br/><br/>The paper explains how the measure is operationalised within the context of traffic conflict observations. The Extended Delta-V traffic conflict measure integrates the proximity to a crash as well as the outcome severity in the event a crash would have taken place, which are both important dimensions in defining the severity of a traffic event. The results from a case study are presented in which a number of traffic conflict indicators are calculated for interactions between left turning vehicles and vehicles driving straight through a signalised intersection. The results suggest that the Extended Delta-V indicator seems to perform well at selecting the most severe traffic events. The paper discusses how the indicator overcomes a number of limitations of traditional measures of conflict severity. While this is a promising first step towards operationalising an improved measure of traffic conflict severity, additional research is needed to further develop and validate the indicator.},
  author       = {Laureshyn, Aliaksei and De Ceunynck, Tim and Karlsson, Christoffer and Svensson, Åse and Daniels, Stijn},
  issn         = {1879-2057},
  language     = {eng},
  pages        = {46--56},
  publisher    = {Elsevier},
  series       = {Accident Analysis & Prevention},
  title        = {In search of the severity dimension of traffic events: Extended Delta-V as a traffic conflict indicator},
  url          = {http://dx.doi.org/10.1016/j.aap.2016.09.026},
  volume       = {98},
  year         = {2017},
}