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• W3137280711 endingPage "106089" @default.
• W3137280711 startingPage "106089" @default.
• W3137280711 abstract "• This study examines the interaction effect between roadway attributes and commercial vehicle percentage on crash rate. • Small commercial passenger vehicle (taxi) proportion: effect on slight-injury crash rate is moderated by intersection density. • Light-goods commercial vehicle proportion: effect on slight-injury crash rate is magnified by the presence of on-street parking. • Medium- and heavy-goods vehicle proportion: association with KSI crash rate is moderated by the number of traffic lanes. • Medium- and heavy-goods vehicle proportion: association with KSI crash rate is moderated by intersection density. In previous research, the effects of commercial vehicle proportions (CVP) on overall crash propensity have been found to be significant, but the results have been varied in terms of the effect direction. In addition, the mediating or moderating effects of roadway attributes on the CVP-vs-safety relationships, have not been investigated. In addressing this gap in the literature, this study integrates databases on crashes, traffic, and inventory for Hong Kong road segments spanning 2014–2017. The classes of commercial vehicles considered are public buses, taxi, and light-, medium- and heavy-goods vehicles. Random-parameter Tobit models were estimated using the crash rates. The results suggest that the CVP of each class show credible effects on the crash rates, for the various crash severity levels. The results also suggest that the interaction between CVP and roadway attributes is credible enough to mediate the effect of CVP on crash rates, and the magnitude and direction of such mediation varies across the vehicle classes, crash severity levels, and roadway attribute type in four ways. First, the increasing effect of taxi proportion on slight-injury crash rate is magnified at road segments with high intersection density. Second, the increasing effect of light-goods vehicle proportion on slight-injury crash rate is magnified at road segments with on-street parking. Third, the association between the medium- and heavy-goods vehicle proportion and killed/severe injury (KSI) crash rate, is moderated by the roadway width (number of traffic lanes). Finally, a higher proportion of medium- and heavy-goods vehicles generally contributes to increased KSI crash rate at road segments with high intersection density. Overall, the findings of this research are expected not only to help guide commercial vehicle enforcement strategy, licensing policy, and lane control measures, but also to review existing urban roadway designs to enhance safety." @default.
• W3137280711 created "2021-03-29" @default.
• W3137280711 creator A5015912289 @default.
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• W3137280711 date "2021-05-01" @default.
• W3137280711 modified "2023-10-13" @default.
• W3137280711 title "Analysing the main and interaction effects of commercial vehicle mix and roadway attributes on crash rates using a Bayesian random-parameter Tobit model" @default.
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• W3137280711 doi "https://doi.org/10.1016/j.aap.2021.106089" @default.
• W3137280711 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33773197" @default.
• W3137280711 hasPublicationYear "2021" @default.
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