Geometric design deficiencies on existing roads would lead to a potential accident, such as an accident happens at the sharp curves, layered pavement conditions, and slippery pavement surface. Road traffic accident has been increasing in the Southern Region of Tigray, of which this area was shown to have alarming rates. According to the Southern Tigray Regional Police, the high figure of road traffic accidents was recorded in Alamata, Mehoni and Hewane districts. This research study focused on the analysis of traffic accidents related to geometric design parameters of the existing asphalt road. While the data for the analysis covered route data, traffic accident report from the police station containing some injuries, crashes, and damage to properties, as well as interviews and questionnaire surveys to people who are directly involved in road travels, are considered. The primary data have mainly covered the geometry of the road which was measured during the site survey, road safety audit using the checklist, interview, and questionnaire survey. On the other hand, the secondary data collected from the traffic management office in the district offices. On this, the results presented in the form of line graphs, pie charts, figures for road traffic accident and sketch for the suggested improvement in the road design problem. Based on the results of the study in the year 2010 to the year 2015, it found out that there were 866 Road Traffic Accidents have been occurring in the vicinity of the survey road sections. From this figure, the road traffic accident and damaged to properties expressed as an equivalent amount of about 33,565,122.00 Birr. It revealed that the primary cause of road traffic accidents in the study area emanated from the road design elements due to some geometric deficiencies at the traffic accident prone areas. Therefore, this study concluded that the frequency of occurrence of road traffic accidents and the figure of casualties is significantly increasing. This road accident would persist if the concerned agencies do not adequately address the malady. Index Terms— Asphalt Road, Casualties, Geometric design parameters, Road design elements, Road safety audit, Traffic Accident, Traffic management.

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Published on 01/01/2017

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