Institute of Technology

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The Institute of Technology focuses on education, research, and innovation in engineering, technology, and applied sciences to support sustainable development.

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    PERFORMANCE EVALUATION OF ANBESSA CITY BUS SERVICE ENTERPRISE TRANSPORT SERVICE: THE CASE OF ADDIS ABABA-BISHOFTU CORRIDOR
    (Hawassa University, 2018-03-25) TAMRAT BERARA GETU
    Providing and improving public transport service is becoming highly important to meet the demand of rapidly growing mass mobility due to high population growth and galloping urbanization in and around the city of Addis Ababa. Performance measurement is a popular activity in the transportation sector. Various studies on the performance of transportation systems with the utilization of data analysis have been common. In Addis Ababa-Bishoftu corridor public transport problem related to limited numbers of buses, insufficiency of bus routes, inadequacy of bus stops and operational deficiency are common. This research evaluate the performance of public transport service provided by Anbessa City Bus Service Enterprise (ACBSE) in the selected corridor. The study uses GIS techniques and Statistical (descriptive, correlation, factor and regression) analysis to assess the route network, travel speed, dwell time and passenger carrying capacity of the transport service. It has identified that there is route network gap for the town of Bishoftu and the current transport service in this corridor is poor. In addition to this the study assess the level of satisfaction of customers about the transport service provision of ACBSE in related to selected performance indicators such as frequency, travel speed, price, security, bus comfort, seat availability, vehicle overcrowding, punctuality and safety of the transport service. The study indicates that in the selected corridor there is very limited number of buses, there is high breakdown of buses and existing buses are not operating as per the schedule. Therefore, the service is found not reliable for travelers. Excessive waiting time and long walking distance to reach the service make it inconvenient. Moreover, high overcrowding and lack of seat inside the bus makes it uncomfortable. Correspondingly, the quality of the service is poor and customers are not satisfied about the transport service of ACBSE. In terms of LOS in most case the transport service operates at LOS D and lower. Thus to improve ACBSE transport service for Addis Ababa-Bishoftu corridor this research suggest that the extension of route network coverage for the town of Bishoftu, increase frequency of the transport service, upgrading the ticketing procedure, improving treatment of customers by bus operators and bus priority measures for high traffic congestion areas
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    EVALUATING THE TRAFFIC OPERATIONAL PERFORMANCE IN ADDIS ABABA: A CASE OF MEGENAGNA TO AYAT ROAD CORRIDOR
    (Hawassa University, 2021-10-17) BETHLEHEM TILAHUN GEBRE
    Poor traffic performance is a major problem in many countries affecting urban traffic sustainable development at present. It has a significant effect on social, economic, and environmental. Due to economic development and urbanization, transport in Addis Ababa has faced traffic congestion problems. This paper presents a study on the evaluation of operational performance of traffic in Addis Ababa in the case of the Megenagna to Ayat road network by addressing the factors that cause traffic congestions. LOS, average delay, and degree of saturation were quantified for three roundabouts using SIDRA software to analyze the traffic conditions in the study area. And Levels of service for three road segments were quantified using HCM 2010. A multiple regression analysis using SPSS was applied to quantify the factors that cause congestion on the performance of the road network based on questionnaire and field data. From the analysis, average speed of Ayat to Yetebaberute, Yetebaberute to Sahilitmiheret, Sahilitmiheret to Megenagna road segments were 11.6km/hr, 6.3km/hr & 5.45km/hr respectively and it was 30.08%, 26.14% & 22.59% of the free flow speed respectively. The LOS of these three road segments was F, and the traveler perception score was greater than 5, indicating drivers perceived the worst service. And for the three roundabouts i.e., Sahilitmiheret, Yetebaberute, and Ayat roundabouts, the overall LOS was F, so the degree of saturation is greater than 1 with the overall average delay of 405.20sec, 211sec and 310.2sec, respectively. The results from SIDRA software indicated that the roundabouts are providing traffic service above their capacity during the peak hour. From the SPSS result of the mean-variance results are significant at 0.05(p-0.05), which means that the factors caused traffic congestion in the study area. The regression model developed with R2 of 0.985, which is greater than 0.7, which shows the model was reliable. Based on the result of the study, the roundabouts were over congested; their operational characteristics were unsatisfactory, serving beyond their capacity & at a poor level of service. And the roundabouts contribute significant effect for the performance of the segments. The performance of the road network was poor and cause significant delay for the user. The factors that contribute for the poor traffic performance in the study area were significant to cause congestion.
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    OPERATIONAL ANALYSIS OF UNSIGNALIZED INTERSECTION AND ROUNDABOUT UNDER MIXED TRAFFIC FLOW CONDITION OF SELECTED INTERSECTIONS IN ADAMA CITY
    (Hawassa University, 2020-10-06) DARARA BERHANU KURU
    Urban traffic congestion is currently severe in most cities in the world due to economic and social development. Prevalently, Ethiopia is one of the countries that are in rapid economic development. This influences the travel pattern of the community from their origin to any destination. Adama is one of busy transportation center in Ethiopia. The city is situated along the road that connects Addis Ababa with Dire Dawa. A large number of trucks use this same route to travel to and from the seaports of Djibouti. A little attention has been paid to junctions and their capacities. There are a few studies conducted to assess the capacity of junctions in Adama. The main objective of this study was to evaluate operational performance on both unsignalized and roundabout junctions which are necessary for transport professional’s and governors to put tangible information for future traffic growth of Adama city. This thesis addresses the most important element of operational performance of unsignalized intersections and roundabouts traffic intersections in Adama City on capacity analysis. The methodology employed for this study was the quantitative descriptive research design which used quantitative data and analyzed using SIDRA 8.1 intersection software model. The movements of the vehicles were observed at three roundabouts and seven unsignalized intersections for a duration of two hours. The necessary geometric data for the analysis (average entry width, circulatory road width, number of entry and circulatory lanes, and island diameter), traffic movement data with vehicle characteristics and pedestrian volume were collected. The capacity analysis was done based on the gap acceptance method that is adopted by SIDRA 8.1 software program. Based on analysis results, Derartu Tulu roundabouts and six of selected unsignalized intersections i.e Mebrathayil,Sartera,Wonji,Tikur Abay and Alem Hotel junctions are currently serving in poor condition of level of service of F by having v/c ratio >1. Genda Gara and Medanihalem roundabouts are serving at their best operating condition having level of service A.The rest two unsignalized intersection Geda and Diamond Cafe have level of service of D and C respectively. The overall level of service of the unsignalized intersections and roundabouts are serving at poor level of service. Thus, after carrying out additional detail investigation and taking into consideration future traffic growth appropriate improvement should be made by concerned bodies