The Influence of Street Pattern Configuration on Road Traffic Accident in The Case of Two Cities: Dilla and Debre Birhan, Ethiopia
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Date
2024-06-01
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Addis Ababa University
Abstract
The purpose of this study is to find out, whether the variation of street pattern configuration impacts the incidence of Road traffic accident (R.T.A.). Dilla and Debre Birhan cities are selected due to their different street pattern configuration and approximate equal number of population. RTA, in Dilla city is the most common type of injury causes and it is responsible for higher percentage of death among suffering patients. Residents believe that, the cause of this accident is the city’s grid iron street pattern configuration. Debre Birhan in the other hand has mixed street pattern configuration and has relatively lower accident rate. In order to assess the influence, initially, identifying hotspot areas, then analyzing road maps of each city to get data about street configuration parameters, representing hotspots on each cities’ street maps as well as their parametric maps and selecting the most significant parameters to correlating the variables are followed respectively. Street maps of the cities are converted to axial map to analyze the configuration using tool of analysis, called space syntax via software depth map X. This data collaborating with accident risk rate, states their correlation one to another. Consequently, the study provided accident estimation models based on the parameters of street pattern configuration. For Dilla it is explainable by the predictors F (6, 4) = 19.03, p 0.05, R2 = 0.799. Adjusted R value brought the significance level’s explainablity of Dilla’s RTA by parameters to 91.5% and 33% for Debre Birhan. Finally it’s recommended to create awareness about space syntax for those having no prior experience and highlights the importance of considering space syntax while planning and designing road network, is important factor.
Key Words: RTA, Space Syntax, Dilla city road network, Debre Birhan city road network.