Browsing by Author "Biniyam, Ayalew (Mr.)"

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    Analyzing Addis Ababa Light Rail Transit Railway Operation Reliability
    (AAU, 2017-07) Abdourahman, Omar Hassan; Biniyam, Ayalew (Mr.)
    Delays in railway networks cause problems in the daily operation and result in reduced reliability of the railway operation. Since the delay is not caused only by the overcrowded train schedules but also the congestion at railway stations during the peak hours. In fact the determination of train dwell time is an essential step in planning railway timetable with taking the passengers‘ experience into account. In view of that, this research focuses on describing how it is possible to use passenger flow to estimate the actual delays on Addis Ababa LRT. The combination of the passenger flow on dwell time and the headway of a train is described, the research methodology adopt a strategy to estimate these paramaters to consider various kinds of improvement and demonstrating the possibility of predicting an eventual decreasing the delay of the trip and by the same time satisfy the customers. The result demonstrated that using together between dwell time and headway time to analyse the reliability of AALRT have given a benefit return concerning about the delay caused but the daily operation.. Finally, as the proposed investigated method is relatively easy to implement based on collection passengers flow data, the contributions from the outcomes of these models are briefly addressed.
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    Assessment of Improvement Areas for Increasing the Capacity of Ethio-Djibouti Railway Line
    (AAU, 2018-03) Yohannes, Melkamu; Biniyam, Ayalew (Mr.)
    Ethio-Djibouti railway line can support the economic growth of the country by allowing transportation of more goods than now, reduce greenhouse gas emission (environmental friendly), reduce road congestion, allows the country to increase the variety of export goods. This research aims to analyze the capacity issues of Ethio-Djibouti railway line and identify and assess possible capacity improvement areas to satisfy the railway transport demand of Ethiopia for the coming 50years time period. To attain the objective of the research firstly practical capacity of the existing EthioDjibouti railway line is done by UIC405 analytical method; secondly railway transportation demand for both freight and passenger is assessed along the corridor; it‟s obvious that the capacity of the existing railway will saturate in the future, the saturation year is identified by comparing the practical capacity of Ethio-Djibouti railway line with railway transportation demand analysis done along the corridor. Finally possible capacity expansion plan mainly infrastructure improvement is identified in this research. The single track section of Ethio-Djibouti railway practically can accommodate 33 trains/day. The section from Dire Dawa to Negad starting from 2030GC; the section from Awash to DireDawa starting from 2036GC and the section from Adama to Awash starting from 2037GC will become saturated and needed capacity improvement. To satisfy the increasing railway transportation demand along Ethio-Djibouti railway line increasing the number of trains operating on the line can be the solution; but the sections infrastructure capacity wouldn‟t allow to add more trains in the saturation years. Therefore, in 2030GC the single track railway from DireDawa to Djibouti; in the year of 2036GC the section from Awash to Dire Dawa and in the year of 2037 GC the railway line section from Adama to Awash should have to be changed to double track in order to fulfill the demand. The double track section from Sebeta to Adama can practically accommodate 64 trains/day but the demand analysis shows that starting from 2059GC the line will become saturated in this case infrastructure expansion is not necessary because it can satisfy the demand on the specified time window.
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    Assessment of Improvement Areas for Optimizing the Capacity of Addis Ababa LRT
    (Addis Ababa University, 2017-07) Roukia, Karieh Bouraleh; Biniyam, Ayalew (Mr.)
    Recently, railway traffic has increased considerably in the different parts of the world; moreover, it is expected that railway transportation will further grow for both passenger and freight transportation. These developments create needs to optimize both the utilization of the infrastructure and the coordination tasks inside the railway company. Investments in railway infrastructure are expensive and already constructed railway infrastructure is not easily adjusted or changed. Dimensioning and constructing railway lines and networks therefore require extensive knowledge of future operation and demand. As the experience shows that the traffic often develops differently than expected. This means that railway infrastructure has to be designed flexibility, for different operational conditions. There are many approaches that are used to model and implement the evaluation of railway capacity. In this thesis reviewing previous relevant literature and available data, analytical method UIC 405 is being used. This method tries to calculate the theoretical capacity in order to evaluate the railway line capacity and from that practical capacity has been determined. First step for railway planning is to determine the demand passenger. To analyze the passenger demand and the number of train needed, a modal split is used to forecast the demand. The developed models are applicable to passengers railway network like Addis Ababa LRT. Based on the different analysis made for both on North-South and East-West LRT route, the results show that 34 trains has to be operate for both routes which can respond and satisfy the passenger demand for the current year. Thus the Ethiopian Railway Corporation (ERC) to revise the railway planning by considering the growth population and increase the number of trains.