Girma, Gebresenbet (PhD)Nuhamin, Demeke2020-02-102023-11-112020-02-102023-11-112019-10http://etd.aau.edu.et/handle/12345678/20588According to the United Nations Overview of Addis Ababa City Solid Waste Management System (2010), it is estimated that only 65% of the waste generated in the city is collected, with the rest being deposited in open sites, drainage channels, and rivers. And also due to lack of awareness and willingness to sort wastes at household levels it makes the waste management practice poor. As Bole is one of the sub-cities among the 10 sub-cities, the waste collection and transportation is not efficient. Therefore, in order to improve the waste collection efficiency, properly designed and optimized waste collection routing system is very crucial for minimizing operating cost and to reduce littering of uncollected solid wastes from roadsides and open areas. This paper deals with, assessing the current waste logistics practice in Bole sub-city and improving the waste logistics system by applying Geographical Information systems as a decision support tool for the optimization of waste collection and transportation for improving waste collection efficiency. From the study, it was found that the waste logistics practice of sorting, recycling, composting are practiced with a little extent measuring below 50%. The study also optimized the total collection distance by comparing two scenarios with the current collection route. The scenarios were: optimization without transfer station and with the introduction of transfer station locations 1 and 2. From the analysis, 79.1 %, 86% and 82.4% benefit of the optimized route distance and 54.8%,68.3% and 58.5% benefit of total travel time without the application of transfer station and with the application of transfer station location 1 and 2 respectively were obtained. The major conclusion of this study is the waste management of the sub-city suffers from a poor waste logistics practice and an inefficient waste collection and transport system. Though the results from this study are encouraging enough to further expand the scope to cover all sub-cities in Addis Ababa, in order to improve the waste logistics practice in the sub-city, a lot of effort is needed to create an awareness on reverse logistics to the public and an efficient waste logistics practice has to be introduced to tackle the problem.en-USsolid waste managementreverse logisticsGISoptimizationThesis