Robeam Solomon (PhD)Anteneh Zemedkun2025-04-252025-04-252025-01https://etd.aau.edu.et/handle/123456789/5360Providing of mass transport such as electric train in urban area is the best method to solve many transport problems such as safety, congestion, delay, free from air pollution, shortage of transport system supplies and others. However, provision of mass transport like urban light railway transit in congested city becomes a major cause for different problems such as excessive delay and queue formation and low performance of roads specially at grade crossing intersections and roundabouts that will be shared by pedestrian, light rail way and Motorized vehicle along the LRT. Accordingly, the main Couse for the problems are due to the light rail way builds parallel with center/median of road alignment and fragmented of the road area by fence, at grade crossing intersections become more congestion due to they were designed and build by considering only motorized vehicle and pedestrian without considering the new provided LRT, high concentration of U turns traffic due to lack of U turns in other locations and Un-controlled and high concentrated pedestrian crossing activities. Performance evaluation of the intersection under current traffic conditions was done during peak periods. The performance evaluation indicated that the approach delays of the intersection become over twelve minutes during peak periods. This research deals about improving the Level of Service of Light Train, Pedestrian and Motorized Vehicle Shared – Space at grade signalized Intersection, Case study Saris Adey Ababa at grade Signalized Intersection by propose alternative solution for the identified problems causes and to see if an acceptable performance can be achieved with-out provision of under pass and over passes (grade separation). In order to achieve this goal necessary data were collected at the study intersection. Formerly VISSIM simulation software was used to for designed and modeling. During the study Fixed Traffic Signal control with calibrated saturation flow, Transit Signal Priority, installation of Pedestrian fence and signals and diverting U turns to other locations are considered as alternative solutions. Performance evaluation such as maximum and average queue length, travel time, intersection delay and level of service was used as Comparing criteria under current and future traffic conditions. The best options for the study area are Fixed Traffic Signal control and Transit Signal Priority. Since, diverting U turns on other locations and provision of pedestrian signal were applied simultaneously with Fixed Traffic Signal control and Transit Signal Priority. Related to selecting the best alternative from Fixed Traffic Signal control and Transit Signal Priority. Fixed traffic signal control has less intersection delay of 72.9 sec/veh for vehicles however; it has additional delay on Tram and main traffic flow directions. On the other hand transit Signal Priority has higher intersection delay 79.9 sec/veh and additional approach delay on the opposite direction from Tram way but it has less approach delay for main approaches vehicles and for Trams. Transit Signal Priority with green extension and Red Truncation are preferred to be applied.en-USspaced intersectionTransit Signal PriorityCongestionVISSIMThesis