Evaluating the Impact of various Geometric Characteristics of Rural Two Lane Road on Traffic Safety in Ethiopia

International Journal of Civil Engineering

© 2020 by SSRG - IJCE Journal

Volume 7 Issue 6

Year of Publication : 2020

Authors : Sisay Alemu Munea, Dr. Raju Ramesh Reddy, Gebrefilmuna Abera

10.14445/23488352/IJCE-V7I6P101

How to Cite?

Sisay Alemu Munea, Dr. Raju Ramesh Reddy, Gebrefilmuna Abera, "Evaluating the Impact of various Geometric Characteristics of Rural Two Lane Road on Traffic Safety in Ethiopia," SSRG International Journal of Civil Engineering, vol. 7,  no. 6, pp. 1-11, 2020. Crossref, https://doi.org/10.14445/23488352/IJCE-V7I6P101

Abstract:

Due to the fast economic change and growth in developing countries, the demand for transportation of goods and passengers is increasing day today. This needs a lot of transportation system arrangements on both highways and urban roads. However, the existing transportation systems are characterized by high accident levels and unsafe public transport. Studies indicated that the causes for these problems are due to poor infrastructure, lack of proper road design, and less priority for safety on the roads. The present study is to investigate the effect of road geometric and other roadway characteristics of rural two-lane roads on safety. Accident data is collected from the respective traffic police stations for 5 years from 2013 to 2017. The data is then sorted out based on the various causes of accidents that are recorded in the traffic police records. The geometric characteristics such as Sight Distance, Radius of Curvature, Road Width, Vertical Curves, Superelevation grade, and Curve Length are considered as major sources of occurrence of accidents on highways. The sorted accident data is studied to develop accident models using Poisson regression, Negative Binomial regression, multiple linear regression methods. Keeping because of the logical fitness and validation, the Multiple linear regression method is selected and various crash models are developed in relation to each geometric character. The analysis of the developed models is expected to understand the influence of each geometric character on road safety and will bring possible recommendations to mitigate the accidents and their severity thus reducing the human loss and property damages.

Keywords:

Geometric Characteristics, Crash Prediction, Crash frequency, Black Spot Road Section, Fatal accidents, Serious Injury, Light Injury, Traffic Volume, Multiple Linear Regression

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