Analysis of road safety trends at signalised intersections in Toowoomba

Milton, Ross (2016) Analysis of road safety trends at signalised intersections in Toowoomba. [USQ Project]

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Road trauma is one of the most significant public health concerns of developed countries. Transportation is a risky activity as motion creates kinetic energy and if a road crash occurs the energy exchange can be harmful to both people and property. Previous Toowoomba Road Crash data indicates that 64% of all collisions occurred at intersections. Therefore the main aim of this research project was to identify intersection features which aid in the reduction of road crashes at signalised intersections in Toowoomba.

This aim has been achieved through the development of a signalised intersection classification system which was successful in classifying 50 out of 71 intersections into similar groups, based upon intersection geometry, signal phasing and traffic volume. Road crash trends were analysed at these 50 intersections and common crash types and contributing factors were identified.

A 33% reduction in road crashes was observed at intersections with four phase signal cycles, when compared to intersections with two and three phase cycles.
Similar crash reductions and reductions in crash severity were also observed at intersections with designated right turn lanes compared to intersections without any. Intersections with two phase signal cycles had an increased proportion of road crashes caused by drivers disobeying traffic signals, when compared to intersections with three and four phase cycles.

Engineering solutions to enhance road user safety within the region have been proposed for the intersections with the 10 highest crash rates. These crash reduction solutions have been based upon the findings of this research project. Significant crash rate reductions could be achieved by adding additional controls to these 10 intersections.

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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Honours) Major Civil Engineering project
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: Somasundaraswaran, Soma and LaGrange, Etiene
Date Deposited: 21 Jul 2017 01:49
Last Modified: 21 Jul 2017 01:49
Uncontrolled Keywords: road safety trends; signalised; intersections; Toowoomba; road crashes
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090502 Construction Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400504 Construction engineering

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