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Analysing Clearance Time of Urban Traffic Accidents in Abu Dhabi using Hazard-based Duration Modelling Method
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Dr Dilum Dissanayake
AlKaabi A, Dissanayake D, Bird R
Transportation Research Record
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Traffic incidents generate a lot of adverse impacts in many areas such as traffic flow, air pollution, fuel consumption, and secondary crashes, and therefore it will be vital for traffic incident responders and operators to know how they can improve the efficiency of traffic incident management. This paper presents the results of investigating the effects of traffic accident characteristics on the accident clearance time using fully parametric’ hazard-based duration models with emphasize of Accelerated Failure Time (AFT) metric. Accident characteristics and clearance times were obtained from Abu Dhabi, the capital of the United Arab Emirates. The data was obtained from the Federal Traffic Statistics System and the records of Abu Dhabi Collision Investigation Branch during the period from May, 2009 to April 2010. For the purpose of this study, clearance time was defined as the length of time between the arrivals of collision investigator on the accident scene until the collision investigator leaves the scene. According to the goodness of fit test conducted in the study, the Weibull model without gamma heterogeneity was utilized in this study. The estimation results show that various accident characteristics were found to be significantly affecting clearance time including month of year, location, weather condition, accident type, number of causalities, and number of vehicles involved. These results highlighted some weakness points in the current practices of clearing accident in Abu Dhabi. Accordingly, this paper suggested some mitigation measures.
US National Research Council
Transportation Research Board 90th Annual Meeting. Washington DC, USA. 23-27 January 2011.
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