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Notably, the study identifies factors contributing to occupant’s injury severity in heavy-
vehicle angle collisions. In addition, the study also provides road safety professionals with
information on the advantages and disadvantages of using these statistical models.
6.2 Contributions
In previous chapters, three studies were presented, which extend the literature on heavy
vehicle collisions. In Chapter 3, the first study examined the differences in factors
contributing to crashes at intersections and mid-blocks. On the other hand, study two
(Chapter 4) examined the influence of the socioeconomic characteristics of neighbourhoods
on road-user injury severity in crashes involving heavy vehicles. Finally, the third study
(Chapter 5) examined factors contributing to injury severity in heavy-vehicle angle crashes.
Generally, there are limited studies on the reduction of heavy-vehicle crash injury severity.
The contribution of each of the studies is highlighted as follows:
Although intersections can be considered as hazardous locations on the road, to
date few studies have been conducted on factors contributing to crashes at
intersections and mid-blocks. In addition, there have been limited studies on
single-vehicle crashes compared to multi-vehicle crashes involving heavy
vehicles and some important variables (e.g. road division marking) have been
identified, which not yet been examined in the literature. Therefore, study 1
(Chapter 3) highlights factors contributing to single-vehicle crashes involving
heavy vehicles at intersections and mid-blocks.
Few previous studies have considered the influence of the socio-demographic
characteristics of the neighbourhood where accident victims live and where
crashes occur on road users’ injury severity. In addition, no previous study has
specifically examined the socio-demographic characteristics of the
neighbourhood where persons reside and where collisions occur on road-users’
injury severity in accidents involving heavy-vehicle collisions.
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