CALIBRATION AND APPLICATION OF MICROSCOPIC TRAFFIC SIMULATION MODEL

Abstract

In recent times more and more countries are successfully adopting intelligent transport system (ITS) as a means of managing the transport system including some developing countries. Microscopic traffic simulation plays a vital role when it comes to intelligent transport system especially for dynamic traffic assignment and route guidance. In this study a microscopic traffic simulation model for Shibbari in Khulna of Bangladesh has been calibrated to simulate the demand and supply parameters as well as to experiment practical applications of the model to increase the performance of the roundabout. Shibbari roundabout is a roundabout at the confluence of Majid Sharani, KDA Avenue and Upper Jessore Road. Traffic congestion occurs during peak hour at this roundabout which increases the queue length and travel time. Root mean squares of queue length, travel time and combination of both have been used to calibrate the simulated model. Simulation of Urban mobility (SUMO) software version 0.21.0 has been used to calibrate the model based on car following theory to replicate the reality reflected in traffic measurement. From the calibrated model it can be seen that the parameter driver imperfection and driver's reaction time have significantly greater influence on the model comparing to other parameters. To illustrate the practical application of the calibrated model two alternative scenarios have been developed and comparison between them has been done to find the optimal measure to be taken to manage the traffic and improve the perfol111ance of Shibbari roundabout of Khulna city.