Titill: | Accidents between pedestrians, bicyclists and motorized vehicles: Accident risk and injury severity |
Höfundur: | |
Leiðbeinandi: | Andras Varhelyi; Thomas Jonsson |
Útgáfa: | 2015 |
Tungumál: | Enska |
Umfang: | 156 |
Háskóli/Stofnun: | Lund University |
ISBN: | 978-91-7623-430-3 |
Efnisorð: | Accidents; Pedestrians; Bicyclists; Exposure; Risk; Consequence; Speed; Age; Gangandi vegfarendur; Hjólreiðar; Umferðarslys; Áhættuþættir; Doktorsritgerðir |
URI: | https://hdl.handle.net/20.500.11815/1252 |
Tilvitnun:Kröyer, H. (2015). Accidents between pedestrians, bicyclists and motorized vehicles: Accident risk and injury severity. Lund University
|
|
Útdráttur:The aims of this work are to better understand (1) the relation between exposure and
the risk of an accident between pedestrians and between motorized vehicles and
between bicyclists and motorized vehicles occurring at urban intersections and (2)
how the speed environment and the victim´s age relate to the injury severity/outcome
once a pedestrian or a bicyclist has been struck by a motorized vehicle. Cross sectional
studies are used, and the relations are analyzed using multinomial logit models,
negative binomial regression and other statistical methods.
The results show that there is a positive correlation between the exposure of
pedestrians, bicyclists and motorized vehicles and the number of accidents, i.e. the
more road users there are, the more accidents occur. The models also suggest that this
relation is non-linear; the accident risk per road user is lower at sites where the
exposure is greater (safety in numbers effect). Furthermore, the results show safety in
numbers effect for single pedestrian accidents, which might suggest that the
underlying reasons for this effect is more complex than previously assumed.
The thesis suggest an alternative way to interpret risk values and risk curves for injury
severity/outcome (if one is involved in an accident), in which differences arise
depending on whether the aim is to interpret the relation from an individual
perspective or from the perspective of society as a whole. The results furthermore
show a strong correlation between the speed environment, the age of the victim and
the injury severity/outcome. A considerable proportion of the serious injuries occurs
in low speed environments, seniors suffer more serious injuries than younger
pedestrians and cyclists do, and the effects differ substantially for struck pedestrians
versus struck bicyclists.
|