Urban Planning

Permanent URI for this collection

http://etd.aau.edu.et/handle/12345678/199

Browse

Browsing Urban Planning by Author "Berhanu Woldetensae (PhD)"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Evaluating The Impact of New Overpass Bridge of A Roundabout Compared To Previous Roundabout: The Case of Imperial-Gerji
    (Addis Ababa University, 2023-11-01) Desalegn Aragaw; Berhanu Woldetensae (PhD)
    Roundabout is a form of crossroads that provides traffic control indirectly without the use of traffic signals. When compared to stop-controlled and signal-controlled intersections, roundabouts can improve both safety and traffic flow. Congestion is the biggest issue with roundabouts, and levels fluctuate throug hout time, with a visible surge during the commute to work. Because the majority of pedestrians are wounded in automotive accidents, efforts to improve their safety have focused on reducing pedestrian traffic. Poor road design and a lack of physical roundabout elements have a substantial impact on roundabout capacity and traffic congestion. The objective of this research is to address the critical aspect and effect of a new overpass bridge operational performance, level of service, and capacity analysis of the Imperial-Gerji roundabout. This study used quantitative research methodology, which makes use of numerical data. Geometric data and a traffic volume survey A field survey was conducted to assess the general geometric condition of roundabouts for this study. Traffic volume studies were also carried out to determine the number, movement, and classifications of vehicles at the chosen roundabout approaches. For this study, skilled people manually collected traffic data using a vehicle statistic. According to the findings of SIDRA intersection 9.1 software programs, the degree of congestion at the roundabout is 1.721, which is significantly beyond the recommended criteria for providing a sufficient level of service. As a result, the delay resulted in an overall fuel consumption of 1095.3L/H, a CO2 emission of 2573.9Kg/h, a hydro carbonate emission of 0.288Kg/h, and nitrogen oxides (NOX) emission of 0.589, indicating that the congestion had an effect on the environment According to the analysis, the level of service provided by the Imperial-Gerji intersection prior to the construction of the overpass bridge was F it mean that more traffic is coming and indicating inadequate comfort and increased accident risk, whereas the level of service provided by the intersection after the construction of the overpass bridge was LOS B it mean that continuous traffic flow, and. also indicating continuous traffic flow with substantial control over operational conditions. The following recommendations have been forwarded to important stakeholders for consideration. Imperial-gerji roundabout geometric components should be updated and built in accordance with modern roundabout design rules since they are quite valuable in terms of capability and traffic safety. Proposed building an additional overpass bridge from Hayahulete to Gerji, comparable to the one built from Megenagna to Bole, to improve the capability of a crossroads during peak hours. Keywords: Roundabout, Overpass Bridge, Capacity Analysis, Sidra intersection 9.1, Congestion
  • No Thumbnail Available
    Item
    Integrating Transport and Land Use Planning Strategies for Sustainable Development in Addis Ababa: The Case Study of Lamberet Round About (Northern Bus Station)-Wosen-Mesalemiya-Kotebe Metropolitan University 02 Kotebe Corridor
    (Addis Ababa University, 2024-03-01) Yigzaw Shewaye; Berhanu Woldetensae (PhD)
    The integration of transport and land use is crucial for sustainable urban structures, but the study area as well as the city face challenges due to a lack of coordination between these sectors due to the traditional separation of sectorial functions into different government agencies, despite the city government's efforts. The objective of this study is to investigate ways of achieving sustainable development for integrated transport and land use planning strategies by evaluating the key elements and barriers to integration and proposing some possible solutions. The main research instruments used were document analysis and review, a questionnaire survey, and observation. Within these phenomena, varieties of socio-spatial data were collected from different sources and analyzed using various analytical techniques using ArcGIS and Excel. Then, the study analyzed and evaluated the key elements of integration; based on distribution of population density, land use mix, neighborhood design and layout, parking facilities, road accident, pollution, accessibilities, and assess way of integration development from secondary documents.in addition to this structured questionnaires were distributed to collect data from stake holders that involved in land use planning and transport planning in city administration. Density distribution is inversely related to both household ownership or uses and household annual vehicle traveled. There are several local streets that are directly linked and radiate with arterials, which may be due to poor road design or implementation. In addition, based on the accessibility indicator, the majority of the sub-city residents and study areas are disadvantaged and forced to walk more than the recommended standard value. The overall results obtained through the various analysis methods were used to develop further recommendations about how to integrate transport and land use planning strategies. Diversity of land use categories should be practiced during new settlement, infill development and other development mechanisms by keeping mix ratio standard. The separation of the pedestrian from the vehicle by providing adequate sidewalks is critical to enhancing the safety, security, and convenience of pedestrian users. Providing spaces/access for street vendors is important to increase the existing walkway capacities. Integrating transport and land use planning should start with the early planning process. A coordinated approach to transportation and land use planning resulted for many benefits to the sub-city residents and likely to become attractive for development. So that the government and other stake holders should support these two sectors. Key words: Land use planning, Sustainable development, Integration, Transport planning