Citation

Abidin ANSBZ, Rahim MMA, Voon WS, Radin Umar RS. Proc. Road Saf. Four Continents Conf. 2010; 15: 1118-1129.

Copyright

(Copyright © 2010, Conference Sponsor)

DOI

unavailable

PMID

unavailable

Abstract

The aim of this study was to investigate single vehicle collisions involving trees in Malaysia by using the police national database though (Pol 27) as the data source. From the Pol 27, information on tree-related traffic collisions in year 2006 and 2007 was gathered. The accumulation of cases in both years proved fatal tree-related cases as the highest (38%) compared to non fatal tree cases. Factors which were analyzed from the Pol 27, viz., day,time, area type, road geometry, numbers of carriageway, pavement quality and road shoulder width. A Mann-Whitney U Test was performed to identify pattern variation on seven contributing factors between the two years data from Pol 27. From the comparison done, numbers of carriageway and pavement quality factors displayed significant variation between the two years information that was revealed from the Asymp. Sig. value. Cross tabulation analysis and chi-square test were also performed to determine the odds ratio value and chi square value, respectively. From the chi-square test, only time and road shoulder width factors were found to be associated to injury severity level in tree related collisions. Odds ratio value revealed only time, number of carriageways, pavement condition and road shoulder width recorded significant values. Nighttime (time), dual carriageways roads (number of carriageway), wavy and holed condition roads (pavement quality) and roads with road shoulder width below 2.5 m (road shoulder width) were identified as the more influential variables in fatal tree related collision cases. The findings from this study highlight the crucial variables to be focused on during future interventions to reduce tree related collisions.