Assessment on the Impacts of Road Geometry and Route Selection on Road Safety: A Case of Mettu-Gore Road, Ethiopia

Alamirew Mulugeta Tola^1, and Alemayehu Gebissa²

¹Faculty of Civil & Environmental Engineering, Jimma Institute of Technology, Jimma University, Jimma, Ethiopia

²Faculty of Agricultural and Environmental Sciences, Chair of Geotechnics and Coastal Engineering, Rostock University

Cite this paper:
Alamirew Mulugeta Tola and Alemayehu Gebissa. Assessment on the Impacts of Road Geometry and Route Selection on Road Safety: A Case of Mettu-Gore Road, Ethiopia. American Journal of Civil Engineering and Architecture. 2019; 7(1):13-19. doi: 10.12691/ajcea-7-1-2

Abstract

The objective of this paper is twofold; First, it develops an excel program referring to the governing values of Geometric design manual of Ethiopia in order to identify and quantify inconsistent geometric design on Mettu-Gore road. In order to achieve the first fold of the study, the final As-built geometric design on Mettu-Gore road and the geometric design policy of Ethiopia have been used. Second, it assesses the geometric characteristics of police-reported hotspot zones of the road. The result was confirmed that road geometric parameters such as; Radius of a curve, Superelevation, Gradient, and Sight distance are the most significant factors affecting road safety on Mettu-Gore road.

Keywords:
AADT grade radius of a curve sight distance and Superelevation

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