ESTIMATION OF TRAFFIC DENSITY TO COMPARE SPEED-DENSITY MODELS WITH MOVING OBSERVER DATA

Saurav Barua, Anik Das, Md. Julfiker Hossain

Abstract: An analytical study among vehicular density measured from moving observer method in field and density predicted from theoretical speed-density models are presented in this paper. Kakoli intersection to Abdullahpur of Airport road was surveyed for traffic data collection using test vehicle. Moving observer data were collected from nine test vehicle runs in a weekday. Vehicle counts with and against test vehicle, vehicle passing and over taking the test vehicles, journey time and travel distance were recorded. Parameters of traffic stream such as volume, speed and density were calculated from the collected data. Then Greenshield’s model, Greenberg’s model and Underwood’s model were fitted in the graphical representation of speed-density relationship and corresponding parameters were determined using SPSS. Later, sensitivity analysis and statistical significance tests among these fitted models are presented in comparison with moving observer data.

Keywords: Moving Observer Method, Journey Time, Density, Test Vehicle, Volume.

DOI: https://doi.org/10.15623/ijret.2015.0408080