Public transportation serves as veins to accelerate development in industry, trade,rneducation, health and other services. However, the presence of inefficient operations andrnmanagement system of public transportation service in most developing countries madernpassengers to face great inconveniences, as well as additional costs to the daily trips duernto substantial delays and variability of travel time. Analyzing public transportationrnoperations and management is paramount for making improvement decisions andrnevaluate implemented mitigation measures. Performance indicators such as operational,rnmanagerial and service quality indicators are important tools used to evaluate publicrntransportation service given by the service provider organization. This research wasrnconducted to evaluate the operational, managerial, and service quality performance usingrnperformance indicators of the existing public transportation in the City of Addis Ababarnby taking a specific case study on Anbessa City Bus Service Enterprise. To achieve thernobjective of the study, primary and secondary data was collected through interview,rnquestionnaire, literature survey, and organizational records. The data collected wasrnanalyzed using statistical analysis tools based on the predefined indicators and setrnstandards for developing countries. And also HDM-4 VOC of the RED model was usedrnto calculate the vehicle operating costs (VOCs) of ACBSE buses. The result from thernanalysis showed that; the current operational, managerial and service qualityrnperformance is poor; which lacks efficiency, effectiveness, and productivity. Moreover,rnthe customers, the majority of them, 71% were dissatisfied, while 24% and only 5% werernaveragely and well satisfied respectively by the overall service provision delivered by thernEnterprise. Therefore it has recommended, reforming operational strategies, improvingrnthe management practices, improving the quality of service delivered, and mostrnimportantly modernizing the operation and management systems by integrating ITS andrnICT technologies to better solve the deficiencies and facilitate the working condition.