Traffic Signal Design and Los Determination in a T-Intersection: An Empirical Example at Science Lab Intersection, Dhaka, Bangladesh

Abstract

Traffic congestion is regarded to be the most unpleasant problem for urban inhabitants in Bangladesh due to the prevalence of non-lane based heterogeneous vehicle composition. Especially in the downtown area, the problem has been made worse by the overabundance of unnecessary traffic intersections. City planners and designers must consider signal planning, design, analysis, control, and administration crucial to the effective management of city traffic. The study's overarching goal is to enhance traffic signal design in general, but more specifically, to find a workable solution for the economically significant "Science lab" junction. Webster's approach was used to create the signal after collecting data from a variety of vehicles, and the volume capacity ratio (v/c) was used to establish the service level (LOS). The lowest and maximum green timings for the road condition are given, with the least being 26 seconds and the highest being 69 seconds. In addition, the v/c ratio shows that the LOS is in bad shape, with the vast majority of vehicles going under the speed limit, requiring the driver to pay much more attention to the road. Finally, the study presents some relevant suggestions to lessen delays and guarantee a more continuous flow across the junction under consideration.